Home / 20,387.16-28,096.18-15,903.80

Finding the Fourth Proportional to 20,387.16, 28,096.18 and 15,903.80

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Solution

The fourth proportional to 20,387.16, 28,096.18 and 15,903.80 is: 21,917.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,387.16 : 28,096.18 = 15,903.80 : x
  2. Step 2: Convert to fraction form
    20,387.16/28,096.18 = 15,903.80/x
  3. Step 3: Cross multiply
    20,387.16x = 28,096.18 × 15,903.80
  4. Step 4: Simplify right side
    20,387.16x = 446,836,027.48
  5. Step 5: Solve for x
    x = 446,836,027.48/20,387.16
  6. Step 6: Final answer
    x = 21,917.52

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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.