Home / 20,520.60-28,318.43-11,089.16

Finding the Fourth Proportional to 20,520.60, 28,318.43 and 11,089.16

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Solution

The fourth proportional to 20,520.60, 28,318.43 and 11,089.16 is: 15,303.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520.60 : 28,318.43 = 11,089.16 : x
  2. Step 2: Convert to fraction form
    20,520.60/28,318.43 = 11,089.16/x
  3. Step 3: Cross multiply
    20,520.60x = 28,318.43 × 11,089.16
  4. Step 4: Simplify right side
    20,520.60x = 314,027,601.22
  5. Step 5: Solve for x
    x = 314,027,601.22/20,520.60
  6. Step 6: Final answer
    x = 15,303.04

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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.