Home / 21,158.04-29,155.50-15,814.20

Finding the Fourth Proportional to 21,158.04, 29,155.50 and 15,814.20

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Solution

The fourth proportional to 21,158.04, 29,155.50 and 15,814.20 is: 21,791.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,158.04 : 29,155.50 = 15,814.20 : x
  2. Step 2: Convert to fraction form
    21,158.04/29,155.50 = 15,814.20/x
  3. Step 3: Cross multiply
    21,158.04x = 29,155.50 × 15,814.20
  4. Step 4: Simplify right side
    21,158.04x = 461,070,908.10
  5. Step 5: Solve for x
    x = 461,070,908.10/21,158.04
  6. Step 6: Final answer
    x = 21,791.76

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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.