Home / 15,391.56-21,240.45-8,317.97

Finding the Fourth Proportional to 15,391.56, 21,240.45 and 8,317.97

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Solution

The fourth proportional to 15,391.56, 21,240.45 and 8,317.97 is: 11,478.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,391.56 : 21,240.45 = 8,317.97 : x
  2. Step 2: Convert to fraction form
    15,391.56/21,240.45 = 8,317.97/x
  3. Step 3: Cross multiply
    15,391.56x = 21,240.45 × 8,317.97
  4. Step 4: Simplify right side
    15,391.56x = 176,677,319.68
  5. Step 5: Solve for x
    x = 176,677,319.68/15,391.56
  6. Step 6: Final answer
    x = 11,478.84

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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.