Home / 15,490.17-21,379.55-9,201.33

Finding the Fourth Proportional to 15,490.17, 21,379.55 and 9,201.33

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Solution

The fourth proportional to 15,490.17, 21,379.55 and 9,201.33 is: 12,699.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,490.17 : 21,379.55 = 9,201.33 : x
  2. Step 2: Convert to fraction form
    15,490.17/21,379.55 = 9,201.33/x
  3. Step 3: Cross multiply
    15,490.17x = 21,379.55 × 9,201.33
  4. Step 4: Simplify right side
    15,490.17x = 196,720,294.80
  5. Step 5: Solve for x
    x = 196,720,294.80/15,490.17
  6. Step 6: Final answer
    x = 12,699.69

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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.