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Finding the Fourth Proportional to 7,085.52, 9,778.14 and 3,898.95

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Solution

The fourth proportional to 7,085.52, 9,778.14 and 3,898.95 is: 5,380.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,085.52 : 9,778.14 = 3,898.95 : x
  2. Step 2: Convert to fraction form
    7,085.52/9,778.14 = 3,898.95/x
  3. Step 3: Cross multiply
    7,085.52x = 9,778.14 × 3,898.95
  4. Step 4: Simplify right side
    7,085.52x = 38,124,478.95
  5. Step 5: Solve for x
    x = 38,124,478.95/7,085.52
  6. Step 6: Final answer
    x = 5,380.62

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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.