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Finding the Fourth Proportional to 7,371.80, 11,057.70 and 7,031.60

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Solution

The fourth proportional to 7,371.80, 11,057.70 and 7,031.60 is: 10,547.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,371.80 : 11,057.70 = 7,031.60 : x
  2. Step 2: Convert to fraction form
    7,371.80/11,057.70 = 7,031.60/x
  3. Step 3: Cross multiply
    7,371.80x = 11,057.70 × 7,031.60
  4. Step 4: Simplify right side
    7,371.80x = 77,753,323.32
  5. Step 5: Solve for x
    x = 77,753,323.32/7,371.80
  6. Step 6: Final answer
    x = 10,547.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.