Home / 21,539.60-32,309.40-18,861.20

Finding the Fourth Proportional to 21,539.60, 32,309.40 and 18,861.20

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Solution

The fourth proportional to 21,539.60, 32,309.40 and 18,861.20 is: 28,291.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,539.60 : 32,309.40 = 18,861.20 : x
  2. Step 2: Convert to fraction form
    21,539.60/32,309.40 = 18,861.20/x
  3. Step 3: Cross multiply
    21,539.60x = 32,309.40 × 18,861.20
  4. Step 4: Simplify right side
    21,539.60x = 609,394,055.28
  5. Step 5: Solve for x
    x = 609,394,055.28/21,539.60
  6. Step 6: Final answer
    x = 28,291.80

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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.