Home / 20,487.96-28,276.20-11,539.08

Finding the Fourth Proportional to 20,487.96, 28,276.20 and 11,539.08

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Solution

The fourth proportional to 20,487.96, 28,276.20 and 11,539.08 is: 15,925.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,487.96 : 28,276.20 = 11,539.08 : x
  2. Step 2: Convert to fraction form
    20,487.96/28,276.20 = 11,539.08/x
  3. Step 3: Cross multiply
    20,487.96x = 28,276.20 × 11,539.08
  4. Step 4: Simplify right side
    20,487.96x = 326,281,333.90
  5. Step 5: Solve for x
    x = 326,281,333.90/20,487.96
  6. Step 6: Final answer
    x = 15,925.52

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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.