Home / 21,520.92-32,407.23-18,780.42

Finding the Fourth Proportional to 21,520.92, 32,407.23 and 18,780.42

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Solution

The fourth proportional to 21,520.92, 32,407.23 and 18,780.42 is: 28,280.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,520.92 : 32,407.23 = 18,780.42 : x
  2. Step 2: Convert to fraction form
    21,520.92/32,407.23 = 18,780.42/x
  3. Step 3: Cross multiply
    21,520.92x = 32,407.23 × 18,780.42
  4. Step 4: Simplify right side
    21,520.92x = 608,621,390.44
  5. Step 5: Solve for x
    x = 608,621,390.44/21,520.92
  6. Step 6: Final answer
    x = 28,280.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.