Home / 15,471.85-21,351.40-8,398.27

Finding the Fourth Proportional to 15,471.85, 21,351.40 and 8,398.27

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Solution

The fourth proportional to 15,471.85, 21,351.40 and 8,398.27 is: 11,589.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,471.85 : 21,351.40 = 8,398.27 : x
  2. Step 2: Convert to fraction form
    15,471.85/21,351.40 = 8,398.27/x
  3. Step 3: Cross multiply
    15,471.85x = 21,351.40 × 8,398.27
  4. Step 4: Simplify right side
    15,471.85x = 179,314,822.08
  5. Step 5: Solve for x
    x = 179,314,822.08/15,471.85
  6. Step 6: Final answer
    x = 11,589.75

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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.