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Finding the Fourth Proportional to 9,368.91, 12,929.07 and 5,177.16

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Solution

The fourth proportional to 9,368.91, 12,929.07 and 5,177.16 is: 7,144.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,368.91 : 12,929.07 = 5,177.16 : x
  2. Step 2: Convert to fraction form
    9,368.91/12,929.07 = 5,177.16/x
  3. Step 3: Cross multiply
    9,368.91x = 12,929.07 × 5,177.16
  4. Step 4: Simplify right side
    9,368.91x = 66,935,864.04
  5. Step 5: Solve for x
    x = 66,935,864.04/9,368.91
  6. Step 6: Final answer
    x = 7,144.47

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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.