Home / 27,981.72-38,651.58-20,895.84

Finding the Fourth Proportional to 27,981.72, 38,651.58 and 20,895.84

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Solution

The fourth proportional to 27,981.72, 38,651.58 and 20,895.84 is: 28,863.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,981.72 : 38,651.58 = 20,895.84 : x
  2. Step 2: Convert to fraction form
    27,981.72/38,651.58 = 20,895.84/x
  3. Step 3: Cross multiply
    27,981.72x = 38,651.58 × 20,895.84
  4. Step 4: Simplify right side
    27,981.72x = 807,657,231.43
  5. Step 5: Solve for x
    x = 807,657,231.43/27,981.72
  6. Step 6: Final answer
    x = 28,863.75

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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.