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Finding the Fourth Proportional to 27,957.62, 38,581.81 and 15,210.87

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Solution

The fourth proportional to 27,957.62, 38,581.81 and 15,210.87 is: 20,991.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,957.62 : 38,581.81 = 15,210.87 : x
  2. Step 2: Convert to fraction form
    27,957.62/38,581.81 = 15,210.87/x
  3. Step 3: Cross multiply
    27,957.62x = 38,581.81 × 15,210.87
  4. Step 4: Simplify right side
    27,957.62x = 586,862,896.27
  5. Step 5: Solve for x
    x = 586,862,896.27/27,957.62
  6. Step 6: Final answer
    x = 20,991.16

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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.