Home / 21,320.83-29,432.34-15,645.55

Finding the Fourth Proportional to 21,320.83, 29,432.34 and 15,645.55

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Solution

The fourth proportional to 21,320.83, 29,432.34 and 15,645.55 is: 21,597.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,320.83 : 29,432.34 = 15,645.55 : x
  2. Step 2: Convert to fraction form
    21,320.83/29,432.34 = 15,645.55/x
  3. Step 3: Cross multiply
    21,320.83x = 29,432.34 × 15,645.55
  4. Step 4: Simplify right side
    21,320.83x = 460,485,147.09
  5. Step 5: Solve for x
    x = 460,485,147.09/21,320.83
  6. Step 6: Final answer
    x = 21,597.90

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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.