Home / 21,158.62-29,189.50-13,603.55

Finding the Fourth Proportional to 21,158.62, 29,189.50 and 13,603.55

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Solution

The fourth proportional to 21,158.62, 29,189.50 and 13,603.55 is: 18,766.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,158.62 : 29,189.50 = 13,603.55 : x
  2. Step 2: Convert to fraction form
    21,158.62/29,189.50 = 13,603.55/x
  3. Step 3: Cross multiply
    21,158.62x = 29,189.50 × 13,603.55
  4. Step 4: Simplify right side
    21,158.62x = 397,080,642.77
  5. Step 5: Solve for x
    x = 397,080,642.77/21,158.62
  6. Step 6: Final answer
    x = 18,766.85

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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.