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Finding the Fourth Proportional to 6,865.40, 9,472.78 and 4,032.20

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Solution

The fourth proportional to 6,865.40, 9,472.78 and 4,032.20 is: 5,563.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,865.40 : 9,472.78 = 4,032.20 : x
  2. Step 2: Convert to fraction form
    6,865.40/9,472.78 = 4,032.20/x
  3. Step 3: Cross multiply
    6,865.40x = 9,472.78 × 4,032.20
  4. Step 4: Simplify right side
    6,865.40x = 38,196,143.52
  5. Step 5: Solve for x
    x = 38,196,143.52/6,865.40
  6. Step 6: Final answer
    x = 5,563.57

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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.