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Finding the Fourth Proportional to 7,898.30, 10,866.12 and 7,679.60

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Solution

The fourth proportional to 7,898.30, 10,866.12 and 7,679.60 is: 10,565.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,898.30 : 10,866.12 = 7,679.60 : x
  2. Step 2: Convert to fraction form
    7,898.30/10,866.12 = 7,679.60/x
  3. Step 3: Cross multiply
    7,898.30x = 10,866.12 × 7,679.60
  4. Step 4: Simplify right side
    7,898.30x = 83,447,455.15
  5. Step 5: Solve for x
    x = 83,447,455.15/7,898.30
  6. Step 6: Final answer
    x = 10,565.24

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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.