Home / 20,275.92-30,350.16-12,888.72

Finding the Fourth Proportional to 20,275.92, 30,350.16 and 12,888.72

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Solution

The fourth proportional to 20,275.92, 30,350.16 and 12,888.72 is: 19,292.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,275.92 : 30,350.16 = 12,888.72 : x
  2. Step 2: Convert to fraction form
    20,275.92/30,350.16 = 12,888.72/x
  3. Step 3: Cross multiply
    20,275.92x = 30,350.16 × 12,888.72
  4. Step 4: Simplify right side
    20,275.92x = 391,174,714.20
  5. Step 5: Solve for x
    x = 391,174,714.20/20,275.92
  6. Step 6: Final answer
    x = 19,292.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.