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Finding the Fourth Proportional to 9,070.62, 12,488.82 and 8,240.16

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Solution

The fourth proportional to 9,070.62, 12,488.82 and 8,240.16 is: 11,345.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,070.62 : 12,488.82 = 8,240.16 : x
  2. Step 2: Convert to fraction form
    9,070.62/12,488.82 = 8,240.16/x
  3. Step 3: Cross multiply
    9,070.62x = 12,488.82 × 8,240.16
  4. Step 4: Simplify right side
    9,070.62x = 102,909,875.01
  5. Step 5: Solve for x
    x = 102,909,875.01/9,070.62
  6. Step 6: Final answer
    x = 11,345.41

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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.