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Finding the Fourth Proportional to 9,137.59, 12,609.80 and 5,159.48

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Solution

The fourth proportional to 9,137.59, 12,609.80 and 5,159.48 is: 7,120.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,137.59 : 12,609.80 = 5,159.48 : x
  2. Step 2: Convert to fraction form
    9,137.59/12,609.80 = 5,159.48/x
  3. Step 3: Cross multiply
    9,137.59x = 12,609.80 × 5,159.48
  4. Step 4: Simplify right side
    9,137.59x = 65,059,985.11
  5. Step 5: Solve for x
    x = 65,059,985.11/9,137.59
  6. Step 6: Final answer
    x = 7,120.04

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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.