Home / 9,990.71-13,778.27-6,450.20

Finding the Fourth Proportional to 9,990.71, 13,778.27 and 6,450.20

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Solution

The fourth proportional to 9,990.71, 13,778.27 and 6,450.20 is: 8,895.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.71 : 13,778.27 = 6,450.20 : x
  2. Step 2: Convert to fraction form
    9,990.71/13,778.27 = 6,450.20/x
  3. Step 3: Cross multiply
    9,990.71x = 13,778.27 × 6,450.20
  4. Step 4: Simplify right side
    9,990.71x = 88,872,496.01
  5. Step 5: Solve for x
    x = 88,872,496.01/9,990.71
  6. Step 6: Final answer
    x = 8,895.52

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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.