Home / 20,489.40-28,276.43-12,529.13

Finding the Fourth Proportional to 20,489.40, 28,276.43 and 12,529.13

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Solution

The fourth proportional to 20,489.40, 28,276.43 and 12,529.13 is: 17,290.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.40 : 28,276.43 = 12,529.13 : x
  2. Step 2: Convert to fraction form
    20,489.40/28,276.43 = 12,529.13/x
  3. Step 3: Cross multiply
    20,489.40x = 28,276.43 × 12,529.13
  4. Step 4: Simplify right side
    20,489.40x = 354,279,004.76
  5. Step 5: Solve for x
    x = 354,279,004.76/20,489.40
  6. Step 6: Final answer
    x = 17,290.84

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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.