Home / 20,918.52-28,867.32-12,535.02

Finding the Fourth Proportional to 20,918.52, 28,867.32 and 12,535.02

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Solution

The fourth proportional to 20,918.52, 28,867.32 and 12,535.02 is: 17,298.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.52 : 28,867.32 = 12,535.02 : x
  2. Step 2: Convert to fraction form
    20,918.52/28,867.32 = 12,535.02/x
  3. Step 3: Cross multiply
    20,918.52x = 28,867.32 × 12,535.02
  4. Step 4: Simplify right side
    20,918.52x = 361,852,433.55
  5. Step 5: Solve for x
    x = 361,852,433.55/20,918.52
  6. Step 6: Final answer
    x = 17,298.19

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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.