Home / 21,815.10-32,722.65-18,963.90

Finding the Fourth Proportional to 21,815.10, 32,722.65 and 18,963.90

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Solution

The fourth proportional to 21,815.10, 32,722.65 and 18,963.90 is: 28,445.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,815.10 : 32,722.65 = 18,963.90 : x
  2. Step 2: Convert to fraction form
    21,815.10/32,722.65 = 18,963.90/x
  3. Step 3: Cross multiply
    21,815.10x = 32,722.65 × 18,963.90
  4. Step 4: Simplify right side
    21,815.10x = 620,549,062.34
  5. Step 5: Solve for x
    x = 620,549,062.34/21,815.10
  6. Step 6: Final answer
    x = 28,445.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.