Home / 21,387.20-32,042.40-18,929.60

Finding the Fourth Proportional to 21,387.20, 32,042.40 and 18,929.60

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Solution

The fourth proportional to 21,387.20, 32,042.40 and 18,929.60 is: 28,360.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,387.20 : 32,042.40 = 18,929.60 : x
  2. Step 2: Convert to fraction form
    21,387.20/32,042.40 = 18,929.60/x
  3. Step 3: Cross multiply
    21,387.20x = 32,042.40 × 18,929.60
  4. Step 4: Simplify right side
    21,387.20x = 606,549,815.04
  5. Step 5: Solve for x
    x = 606,549,815.04/21,387.20
  6. Step 6: Final answer
    x = 28,360.41

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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.