Home / 15,245.90-21,042.62-9,279.50

Finding the Fourth Proportional to 15,245.90, 21,042.62 and 9,279.50

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Solution

The fourth proportional to 15,245.90, 21,042.62 and 9,279.50 is: 12,807.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,245.90 : 21,042.62 = 9,279.50 : x
  2. Step 2: Convert to fraction form
    15,245.90/21,042.62 = 9,279.50/x
  3. Step 3: Cross multiply
    15,245.90x = 21,042.62 × 9,279.50
  4. Step 4: Simplify right side
    15,245.90x = 195,264,992.29
  5. Step 5: Solve for x
    x = 195,264,992.29/15,245.90
  6. Step 6: Final answer
    x = 12,807.71

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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.