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Finding the Fourth Proportional to 8,699.13, 12,004.74 and 5,162.94

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Solution

The fourth proportional to 8,699.13, 12,004.74 and 5,162.94 is: 7,124.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,699.13 : 12,004.74 = 5,162.94 : x
  2. Step 2: Convert to fraction form
    8,699.13/12,004.74 = 5,162.94/x
  3. Step 3: Cross multiply
    8,699.13x = 12,004.74 × 5,162.94
  4. Step 4: Simplify right side
    8,699.13x = 61,979,752.34
  5. Step 5: Solve for x
    x = 61,979,752.34/8,699.13
  6. Step 6: Final answer
    x = 7,124.82

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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.