Home / 28,078.20-42,117.30-7,301.70

Finding the Fourth Proportional to 28,078.20, 42,117.30 and 7,301.70

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Solution

The fourth proportional to 28,078.20, 42,117.30 and 7,301.70 is: 10,952.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,078.20 : 42,117.30 = 7,301.70 : x
  2. Step 2: Convert to fraction form
    28,078.20/42,117.30 = 7,301.70/x
  3. Step 3: Cross multiply
    28,078.20x = 42,117.30 × 7,301.70
  4. Step 4: Simplify right side
    28,078.20x = 307,527,889.41
  5. Step 5: Solve for x
    x = 307,527,889.41/28,078.20
  6. Step 6: Final answer
    x = 10,952.55

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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.