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Finding the Fourth Proportional to 8,695.80, 13,005.30 and 7,313.40

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Solution

The fourth proportional to 8,695.80, 13,005.30 and 7,313.40 is: 10,937.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,695.80 : 13,005.30 = 7,313.40 : x
  2. Step 2: Convert to fraction form
    8,695.80/13,005.30 = 7,313.40/x
  3. Step 3: Cross multiply
    8,695.80x = 13,005.30 × 7,313.40
  4. Step 4: Simplify right side
    8,695.80x = 95,112,961.02
  5. Step 5: Solve for x
    x = 95,112,961.02/8,695.80
  6. Step 6: Final answer
    x = 10,937.80

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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.