Home / 10,102.80-15,143.40-4,555.20

Finding the Fourth Proportional to 10,102.80, 15,143.40 and 4,555.20

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Solution

The fourth proportional to 10,102.80, 15,143.40 and 4,555.20 is: 6,827.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,102.80 : 15,143.40 = 4,555.20 : x
  2. Step 2: Convert to fraction form
    10,102.80/15,143.40 = 4,555.20/x
  3. Step 3: Cross multiply
    10,102.80x = 15,143.40 × 4,555.20
  4. Step 4: Simplify right side
    10,102.80x = 68,981,215.68
  5. Step 5: Solve for x
    x = 68,981,215.68/10,102.80
  6. Step 6: Final answer
    x = 6,827.93

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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.