Home / 15,435.52-21,301.85-8,721.43

Finding the Fourth Proportional to 15,435.52, 21,301.85 and 8,721.43

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Solution

The fourth proportional to 15,435.52, 21,301.85 and 8,721.43 is: 12,036.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,435.52 : 21,301.85 = 8,721.43 : x
  2. Step 2: Convert to fraction form
    15,435.52/21,301.85 = 8,721.43/x
  3. Step 3: Cross multiply
    15,435.52x = 21,301.85 × 8,721.43
  4. Step 4: Simplify right side
    15,435.52x = 185,782,496.78
  5. Step 5: Solve for x
    x = 185,782,496.78/15,435.52
  6. Step 6: Final answer
    x = 12,036.04

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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.