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Finding the Fourth Proportional to 18,411.56, 25,409 and 10,862.28

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Solution

The fourth proportional to 18,411.56, 25,409 and 10,862.28 is: 14,990.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,411.56 : 25,409 = 10,862.28 : x
  2. Step 2: Convert to fraction form
    18,411.56/25,409 = 10,862.28/x
  3. Step 3: Cross multiply
    18,411.56x = 25,409 × 10,862.28
  4. Step 4: Simplify right side
    18,411.56x = 275,999,672.52
  5. Step 5: Solve for x
    x = 275,999,672.52/18,411.56
  6. Step 6: Final answer
    x = 14,990.56

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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.