Home / 20,387.30-28,108.43-13,204.52

Finding the Fourth Proportional to 20,387.30, 28,108.43 and 13,204.52

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Solution

The fourth proportional to 20,387.30, 28,108.43 and 13,204.52 is: 18,205.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,387.30 : 28,108.43 = 13,204.52 : x
  2. Step 2: Convert to fraction form
    20,387.30/28,108.43 = 13,204.52/x
  3. Step 3: Cross multiply
    20,387.30x = 28,108.43 × 13,204.52
  4. Step 4: Simplify right side
    20,387.30x = 371,158,260.08
  5. Step 5: Solve for x
    x = 371,158,260.08/20,387.30
  6. Step 6: Final answer
    x = 18,205.37

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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.