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Finding the Fourth Proportional to 25,368.78, 38,041.53 and 8,724.30

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Solution

The fourth proportional to 25,368.78, 38,041.53 and 8,724.30 is: 13,082.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,368.78 : 38,041.53 = 8,724.30 : x
  2. Step 2: Convert to fraction form
    25,368.78/38,041.53 = 8,724.30/x
  3. Step 3: Cross multiply
    25,368.78x = 38,041.53 × 8,724.30
  4. Step 4: Simplify right side
    25,368.78x = 331,885,720.18
  5. Step 5: Solve for x
    x = 331,885,720.18/25,368.78
  6. Step 6: Final answer
    x = 13,082.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.