Home / 8,989.70-12,405.26-6,866.68

Finding the Fourth Proportional to 8,989.70, 12,405.26 and 6,866.68

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Solution

The fourth proportional to 8,989.70, 12,405.26 and 6,866.68 is: 9,475.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,989.70 : 12,405.26 = 6,866.68 : x
  2. Step 2: Convert to fraction form
    8,989.70/12,405.26 = 6,866.68/x
  3. Step 3: Cross multiply
    8,989.70x = 12,405.26 × 6,866.68
  4. Step 4: Simplify right side
    8,989.70x = 85,182,950.74
  5. Step 5: Solve for x
    x = 85,182,950.74/8,989.70
  6. Step 6: Final answer
    x = 9,475.62

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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.