Home / 27,631.59-38,143.08-20,919.12

Finding the Fourth Proportional to 27,631.59, 38,143.08 and 20,919.12

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Solution

The fourth proportional to 27,631.59, 38,143.08 and 20,919.12 is: 28,877.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,631.59 : 38,143.08 = 20,919.12 : x
  2. Step 2: Convert to fraction form
    27,631.59/38,143.08 = 20,919.12/x
  3. Step 3: Cross multiply
    27,631.59x = 38,143.08 × 20,919.12
  4. Step 4: Simplify right side
    27,631.59x = 797,919,667.69
  5. Step 5: Solve for x
    x = 797,919,667.69/27,631.59
  6. Step 6: Final answer
    x = 28,877.08

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Half scale
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Double scale
Find fourth proportional to 27,632.59, 38,144.46 and 20,920.12
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.