Home / 11,421.40-17,132.10-10,115.80

Finding the Fourth Proportional to 11,421.40, 17,132.10 and 10,115.80

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Solution

The fourth proportional to 11,421.40, 17,132.10 and 10,115.80 is: 15,173.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,421.40 : 17,132.10 = 10,115.80 : x
  2. Step 2: Convert to fraction form
    11,421.40/17,132.10 = 10,115.80/x
  3. Step 3: Cross multiply
    11,421.40x = 17,132.10 × 10,115.80
  4. Step 4: Simplify right side
    11,421.40x = 173,304,897.18
  5. Step 5: Solve for x
    x = 173,304,897.18/11,421.40
  6. Step 6: Final answer
    x = 15,173.70

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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.