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Finding the Fourth Proportional to 12,495.60, 18,704.18 and 6,931.04

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Solution

The fourth proportional to 12,495.60, 18,704.18 and 6,931.04 is: 10,374.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,495.60 : 18,704.18 = 6,931.04 : x
  2. Step 2: Convert to fraction form
    12,495.60/18,704.18 = 6,931.04/x
  3. Step 3: Cross multiply
    12,495.60x = 18,704.18 × 6,931.04
  4. Step 4: Simplify right side
    12,495.60x = 129,639,343.55
  5. Step 5: Solve for x
    x = 129,639,343.55/12,495.60
  6. Step 6: Final answer
    x = 10,374.80

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1.5x scale

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.