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Finding the Fourth Proportional to 7,487.40, 11,182.47 and 7,040.28

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Solution

The fourth proportional to 7,487.40, 11,182.47 and 7,040.28 is: 10,514.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,487.40 : 11,182.47 = 7,040.28 : x
  2. Step 2: Convert to fraction form
    7,487.40/11,182.47 = 7,040.28/x
  3. Step 3: Cross multiply
    7,487.40x = 11,182.47 × 7,040.28
  4. Step 4: Simplify right side
    7,487.40x = 78,727,719.89
  5. Step 5: Solve for x
    x = 78,727,719.89/7,487.40
  6. Step 6: Final answer
    x = 10,514.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.