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Finding the Fourth Proportional to 8,465.55, 12,699.87 and 2,842.65

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Solution

The fourth proportional to 8,465.55, 12,699.87 and 2,842.65 is: 4,264.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,465.55 : 12,699.87 = 2,842.65 : x
  2. Step 2: Convert to fraction form
    8,465.55/12,699.87 = 2,842.65/x
  3. Step 3: Cross multiply
    8,465.55x = 12,699.87 × 2,842.65
  4. Step 4: Simplify right side
    8,465.55x = 36,101,274.80
  5. Step 5: Solve for x
    x = 36,101,274.80/8,465.55
  6. Step 6: Final answer
    x = 4,264.49

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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.