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Finding the Fourth Proportional to 9,345.76, 12,897.20 and 5,154

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Solution

The fourth proportional to 9,345.76, 12,897.20 and 5,154 is: 7,112.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,345.76 : 12,897.20 = 5,154 : x
  2. Step 2: Convert to fraction form
    9,345.76/12,897.20 = 5,154/x
  3. Step 3: Cross multiply
    9,345.76x = 12,897.20 × 5,154
  4. Step 4: Simplify right side
    9,345.76x = 66,472,168.80
  5. Step 5: Solve for x
    x = 66,472,168.80/9,345.76
  6. Step 6: Final answer
    x = 7,112.55

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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.