Home / 28,085.20-42,127.80-7,308.70

Finding the Fourth Proportional to 28,085.20, 42,127.80 and 7,308.70

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Solution

The fourth proportional to 28,085.20, 42,127.80 and 7,308.70 is: 10,963.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,085.20 : 42,127.80 = 7,308.70 : x
  2. Step 2: Convert to fraction form
    28,085.20/42,127.80 = 7,308.70/x
  3. Step 3: Cross multiply
    28,085.20x = 42,127.80 × 7,308.70
  4. Step 4: Simplify right side
    28,085.20x = 307,899,451.86
  5. Step 5: Solve for x
    x = 307,899,451.86/28,085.20
  6. Step 6: Final answer
    x = 10,963.05

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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.