Home / 15,278.27-21,085.97-8,905.16

Finding the Fourth Proportional to 15,278.27, 21,085.97 and 8,905.16

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Solution

The fourth proportional to 15,278.27, 21,085.97 and 8,905.16 is: 12,290.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,278.27 : 21,085.97 = 8,905.16 : x
  2. Step 2: Convert to fraction form
    15,278.27/21,085.97 = 8,905.16/x
  3. Step 3: Cross multiply
    15,278.27x = 21,085.97 × 8,905.16
  4. Step 4: Simplify right side
    15,278.27x = 187,773,944.79
  5. Step 5: Solve for x
    x = 187,773,944.79/15,278.27
  6. Step 6: Final answer
    x = 12,290.27

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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.