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Finding the Fourth Proportional to 12,361.88, 18,432.55 and 10,988.12

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Solution

The fourth proportional to 12,361.88, 18,432.55 and 10,988.12 is: 16,384.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,361.88 : 18,432.55 = 10,988.12 : x
  2. Step 2: Convert to fraction form
    12,361.88/18,432.55 = 10,988.12/x
  3. Step 3: Cross multiply
    12,361.88x = 18,432.55 × 10,988.12
  4. Step 4: Simplify right side
    12,361.88x = 202,539,071.31
  5. Step 5: Solve for x
    x = 202,539,071.31/12,361.88
  6. Step 6: Final answer
    x = 16,384.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.