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Finding the Fourth Proportional to 18,368.88, 25,344.72 and 13,061.76

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Solution

The fourth proportional to 18,368.88, 25,344.72 and 13,061.76 is: 18,022.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,368.88 : 25,344.72 = 13,061.76 : x
  2. Step 2: Convert to fraction form
    18,368.88/25,344.72 = 13,061.76/x
  3. Step 3: Cross multiply
    18,368.88x = 25,344.72 × 13,061.76
  4. Step 4: Simplify right side
    18,368.88x = 331,046,649.91
  5. Step 5: Solve for x
    x = 331,046,649.91/18,368.88
  6. Step 6: Final answer
    x = 18,022.15

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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.