Home / 20,612.52-28,424.34-17,638.20

Finding the Fourth Proportional to 20,612.52, 28,424.34 and 17,638.20

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Solution

The fourth proportional to 20,612.52, 28,424.34 and 17,638.20 is: 24,322.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,612.52 : 28,424.34 = 17,638.20 : x
  2. Step 2: Convert to fraction form
    20,612.52/28,424.34 = 17,638.20/x
  3. Step 3: Cross multiply
    20,612.52x = 28,424.34 × 17,638.20
  4. Step 4: Simplify right side
    20,612.52x = 501,354,193.79
  5. Step 5: Solve for x
    x = 501,354,193.79/20,612.52
  6. Step 6: Final answer
    x = 24,322.80

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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.