Home / 20,918.70-28,867.74-12,535.20

Finding the Fourth Proportional to 20,918.70, 28,867.74 and 12,535.20

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Solution

The fourth proportional to 20,918.70, 28,867.74 and 12,535.20 is: 17,298.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.70 : 28,867.74 = 12,535.20 : x
  2. Step 2: Convert to fraction form
    20,918.70/28,867.74 = 12,535.20/x
  3. Step 3: Cross multiply
    20,918.70x = 28,867.74 × 12,535.20
  4. Step 4: Simplify right side
    20,918.70x = 361,862,687.43
  5. Step 5: Solve for x
    x = 361,862,687.43/20,918.70
  6. Step 6: Final answer
    x = 17,298.53

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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.