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Finding the Fourth Proportional to 12,360.64, 18,528 and 9,068.80

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Solution

The fourth proportional to 12,360.64, 18,528 and 9,068.80 is: 13,593.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,360.64 : 18,528 = 9,068.80 : x
  2. Step 2: Convert to fraction form
    12,360.64/18,528 = 9,068.80/x
  3. Step 3: Cross multiply
    12,360.64x = 18,528 × 9,068.80
  4. Step 4: Simplify right side
    12,360.64x = 168,026,726.40
  5. Step 5: Solve for x
    x = 168,026,726.40/12,360.64
  6. Step 6: Final answer
    x = 13,593.69

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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.