Home / 15,279.84-21,085.38-9,615.78

Finding the Fourth Proportional to 15,279.84, 21,085.38 and 9,615.78

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Solution

The fourth proportional to 15,279.84, 21,085.38 and 9,615.78 is: 13,269.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,279.84 : 21,085.38 = 9,615.78 : x
  2. Step 2: Convert to fraction form
    15,279.84/21,085.38 = 9,615.78/x
  3. Step 3: Cross multiply
    15,279.84x = 21,085.38 × 9,615.78
  4. Step 4: Simplify right side
    15,279.84x = 202,752,375.30
  5. Step 5: Solve for x
    x = 202,752,375.30/15,279.84
  6. Step 6: Final answer
    x = 13,269.27

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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.