Home / 27,990.05-38,628.99-20,904.17

Finding the Fourth Proportional to 27,990.05, 38,628.99 and 20,904.17

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Solution

The fourth proportional to 27,990.05, 38,628.99 and 20,904.17 is: 28,849.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,990.05 : 38,628.99 = 20,904.17 : x
  2. Step 2: Convert to fraction form
    27,990.05/38,628.99 = 20,904.17/x
  3. Step 3: Cross multiply
    27,990.05x = 38,628.99 × 20,904.17
  4. Step 4: Simplify right side
    27,990.05x = 807,506,780.74
  5. Step 5: Solve for x
    x = 807,506,780.74/27,990.05
  6. Step 6: Final answer
    x = 28,849.79

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Half scale
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Double scale
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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.