Home / 15,663.38-21,615.66-8,590.05

Finding the Fourth Proportional to 15,663.38, 21,615.66 and 8,590.05

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Solution

The fourth proportional to 15,663.38, 21,615.66 and 8,590.05 is: 11,854.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,663.38 : 21,615.66 = 8,590.05 : x
  2. Step 2: Convert to fraction form
    15,663.38/21,615.66 = 8,590.05/x
  3. Step 3: Cross multiply
    15,663.38x = 21,615.66 × 8,590.05
  4. Step 4: Simplify right side
    15,663.38x = 185,679,600.18
  5. Step 5: Solve for x
    x = 185,679,600.18/15,663.38
  6. Step 6: Final answer
    x = 11,854.38

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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.