Home / 15,279.03-21,084.30-8,991

Finding the Fourth Proportional to 15,279.03, 21,084.30 and 8,991

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Solution

The fourth proportional to 15,279.03, 21,084.30 and 8,991 is: 12,407.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,279.03 : 21,084.30 = 8,991 : x
  2. Step 2: Convert to fraction form
    15,279.03/21,084.30 = 8,991/x
  3. Step 3: Cross multiply
    15,279.03x = 21,084.30 × 8,991
  4. Step 4: Simplify right side
    15,279.03x = 189,568,941.30
  5. Step 5: Solve for x
    x = 189,568,941.30/15,279.03
  6. Step 6: Final answer
    x = 12,407.13

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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.