Home / 21,651.59-29,878.36-13,589.55

Finding the Fourth Proportional to 21,651.59, 29,878.36 and 13,589.55

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Solution

The fourth proportional to 21,651.59, 29,878.36 and 13,589.55 is: 18,753.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,651.59 : 29,878.36 = 13,589.55 : x
  2. Step 2: Convert to fraction form
    21,651.59/29,878.36 = 13,589.55/x
  3. Step 3: Cross multiply
    21,651.59x = 29,878.36 × 13,589.55
  4. Step 4: Simplify right side
    21,651.59x = 406,033,433.16
  5. Step 5: Solve for x
    x = 406,033,433.16/21,651.59
  6. Step 6: Final answer
    x = 18,753.05

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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.