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Finding the Fourth Proportional to 27,891.86, 38,489.69 and 15,956.30

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Solution

The fourth proportional to 27,891.86, 38,489.69 and 15,956.30 is: 22,019.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,891.86 : 38,489.69 = 15,956.30 : x
  2. Step 2: Convert to fraction form
    27,891.86/38,489.69 = 15,956.30/x
  3. Step 3: Cross multiply
    27,891.86x = 38,489.69 × 15,956.30
  4. Step 4: Simplify right side
    27,891.86x = 614,152,768.32
  5. Step 5: Solve for x
    x = 614,152,768.32/27,891.86
  6. Step 6: Final answer
    x = 22,019.07

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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.