Home / 21,191.65-29,245.85-12,239.53

Finding the Fourth Proportional to 21,191.65, 29,245.85 and 12,239.53

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Solution

The fourth proportional to 21,191.65, 29,245.85 and 12,239.53 is: 16,891.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,191.65 : 29,245.85 = 12,239.53 : x
  2. Step 2: Convert to fraction form
    21,191.65/29,245.85 = 12,239.53/x
  3. Step 3: Cross multiply
    21,191.65x = 29,245.85 × 12,239.53
  4. Step 4: Simplify right side
    21,191.65x = 357,955,458.45
  5. Step 5: Solve for x
    x = 357,955,458.45/21,191.65
  6. Step 6: Final answer
    x = 16,891.34

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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.