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Finding the Fourth Proportional to 9,641.28, 13,301.28 and 7,129.44

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Solution

The fourth proportional to 9,641.28, 13,301.28 and 7,129.44 is: 9,835.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,641.28 : 13,301.28 = 7,129.44 : x
  2. Step 2: Convert to fraction form
    9,641.28/13,301.28 = 7,129.44/x
  3. Step 3: Cross multiply
    9,641.28x = 13,301.28 × 7,129.44
  4. Step 4: Simplify right side
    9,641.28x = 94,830,677.68
  5. Step 5: Solve for x
    x = 94,830,677.68/9,641.28
  6. Step 6: Final answer
    x = 9,835.90

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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.