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Finding the Fourth Proportional to 8,699.74, 12,005.80 and 5,162.86

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Solution

The fourth proportional to 8,699.74, 12,005.80 and 5,162.86 is: 7,124.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,699.74 : 12,005.80 = 5,162.86 : x
  2. Step 2: Convert to fraction form
    8,699.74/12,005.80 = 5,162.86/x
  3. Step 3: Cross multiply
    8,699.74x = 12,005.80 × 5,162.86
  4. Step 4: Simplify right side
    8,699.74x = 61,984,264.59
  5. Step 5: Solve for x
    x = 61,984,264.59/8,699.74
  6. Step 6: Final answer
    x = 7,124.84

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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.