Home / 20,403.08-28,159.34-12,449.92

Finding the Fourth Proportional to 20,403.08, 28,159.34 and 12,449.92

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Solution

The fourth proportional to 20,403.08, 28,159.34 and 12,449.92 is: 17,182.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,403.08 : 28,159.34 = 12,449.92 : x
  2. Step 2: Convert to fraction form
    20,403.08/28,159.34 = 12,449.92/x
  3. Step 3: Cross multiply
    20,403.08x = 28,159.34 × 12,449.92
  4. Step 4: Simplify right side
    20,403.08x = 350,581,530.25
  5. Step 5: Solve for x
    x = 350,581,530.25/20,403.08
  6. Step 6: Final answer
    x = 17,182.77

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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.