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Finding the Fourth Proportional to 8,666.58, 12,995.75 and 4,278.91

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Solution

The fourth proportional to 8,666.58, 12,995.75 and 4,278.91 is: 6,416.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,666.58 : 12,995.75 = 4,278.91 : x
  2. Step 2: Convert to fraction form
    8,666.58/12,995.75 = 4,278.91/x
  3. Step 3: Cross multiply
    8,666.58x = 12,995.75 × 4,278.91
  4. Step 4: Simplify right side
    8,666.58x = 55,607,590.75
  5. Step 5: Solve for x
    x = 55,607,590.75/8,666.58
  6. Step 6: Final answer
    x = 6,416.33

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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.