Home / 12,247.10-16,881.80-7,990.65

Finding the Fourth Proportional to 12,247.10, 16,881.80 and 7,990.65

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Solution

The fourth proportional to 12,247.10, 16,881.80 and 7,990.65 is: 11,014.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,247.10 : 16,881.80 = 7,990.65 : x
  2. Step 2: Convert to fraction form
    12,247.10/16,881.80 = 7,990.65/x
  3. Step 3: Cross multiply
    12,247.10x = 16,881.80 × 7,990.65
  4. Step 4: Simplify right side
    12,247.10x = 134,896,515.22
  5. Step 5: Solve for x
    x = 134,896,515.22/12,247.10
  6. Step 6: Final answer
    x = 11,014.57

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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.