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Finding the Fourth Proportional to 9,191.76, 12,695.28 and 7,225.92

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Solution

The fourth proportional to 9,191.76, 12,695.28 and 7,225.92 is: 9,980.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,191.76 : 12,695.28 = 7,225.92 : x
  2. Step 2: Convert to fraction form
    9,191.76/12,695.28 = 7,225.92/x
  3. Step 3: Cross multiply
    9,191.76x = 12,695.28 × 7,225.92
  4. Step 4: Simplify right side
    9,191.76x = 91,735,077.66
  5. Step 5: Solve for x
    x = 91,735,077.66/9,191.76
  6. Step 6: Final answer
    x = 9,980.14

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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.