Home / 9,409.28-12,990.12-6,429.44

Finding the Fourth Proportional to 9,409.28, 12,990.12 and 6,429.44

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Solution

The fourth proportional to 9,409.28, 12,990.12 and 6,429.44 is: 8,876.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,409.28 : 12,990.12 = 6,429.44 : x
  2. Step 2: Convert to fraction form
    9,409.28/12,990.12 = 6,429.44/x
  3. Step 3: Cross multiply
    9,409.28x = 12,990.12 × 6,429.44
  4. Step 4: Simplify right side
    9,409.28x = 83,519,197.13
  5. Step 5: Solve for x
    x = 83,519,197.13/9,409.28
  6. Step 6: Final answer
    x = 8,876.26

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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.