Home / 15,505.50-21,399.17-9,134.09

Finding the Fourth Proportional to 15,505.50, 21,399.17 and 9,134.09

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Solution

The fourth proportional to 15,505.50, 21,399.17 and 9,134.09 is: 12,605.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,505.50 : 21,399.17 = 9,134.09 : x
  2. Step 2: Convert to fraction form
    15,505.50/21,399.17 = 9,134.09/x
  3. Step 3: Cross multiply
    15,505.50x = 21,399.17 × 9,134.09
  4. Step 4: Simplify right side
    15,505.50x = 195,462,021.04
  5. Step 5: Solve for x
    x = 195,462,021.04/15,505.50
  6. Step 6: Final answer
    x = 12,605.98

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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.