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Finding the Fourth Proportional to 12,655.28, 17,463.52 and 7,621.13

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Solution

The fourth proportional to 12,655.28, 17,463.52 and 7,621.13 is: 10,516.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,655.28 : 17,463.52 = 7,621.13 : x
  2. Step 2: Convert to fraction form
    12,655.28/17,463.52 = 7,621.13/x
  3. Step 3: Cross multiply
    12,655.28x = 17,463.52 × 7,621.13
  4. Step 4: Simplify right side
    12,655.28x = 133,091,756.18
  5. Step 5: Solve for x
    x = 133,091,756.18/12,655.28
  6. Step 6: Final answer
    x = 10,516.70

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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.