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Finding the Fourth Proportional to 34,358.40, 51,532.80 and 10,987.20

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Solution

The fourth proportional to 34,358.40, 51,532.80 and 10,987.20 is: 16,479.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,358.40 : 51,532.80 = 10,987.20 : x
  2. Step 2: Convert to fraction form
    34,358.40/51,532.80 = 10,987.20/x
  3. Step 3: Cross multiply
    34,358.40x = 51,532.80 × 10,987.20
  4. Step 4: Simplify right side
    34,358.40x = 566,201,180.16
  5. Step 5: Solve for x
    x = 566,201,180.16/34,358.40
  6. Step 6: Final answer
    x = 16,479.27

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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.