Home / 20,498.60-28,277.70-15,781.16

Finding the Fourth Proportional to 20,498.60, 28,277.70 and 15,781.16

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Solution

The fourth proportional to 20,498.60, 28,277.70 and 15,781.16 is: 21,770.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,498.60 : 28,277.70 = 15,781.16 : x
  2. Step 2: Convert to fraction form
    20,498.60/28,277.70 = 15,781.16/x
  3. Step 3: Cross multiply
    20,498.60x = 28,277.70 × 15,781.16
  4. Step 4: Simplify right side
    20,498.60x = 446,254,908.13
  5. Step 5: Solve for x
    x = 446,254,908.13/20,498.60
  6. Step 6: Final answer
    x = 21,770.02

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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.