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Finding the Fourth Proportional to 9,349.61, 12,957.05 and 9,172.20

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Solution

The fourth proportional to 9,349.61, 12,957.05 and 9,172.20 is: 12,711.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,349.61 : 12,957.05 = 9,172.20 : x
  2. Step 2: Convert to fraction form
    9,349.61/12,957.05 = 9,172.20/x
  3. Step 3: Cross multiply
    9,349.61x = 12,957.05 × 9,172.20
  4. Step 4: Simplify right side
    9,349.61x = 118,844,602.55
  5. Step 5: Solve for x
    x = 118,844,602.55/9,349.61
  6. Step 6: Final answer
    x = 12,711.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.