Home / 15,417.40-21,275.92-8,343.76

Finding the Fourth Proportional to 15,417.40, 21,275.92 and 8,343.76

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Solution

The fourth proportional to 15,417.40, 21,275.92 and 8,343.76 is: 11,514.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,417.40 : 21,275.92 = 8,343.76 : x
  2. Step 2: Convert to fraction form
    15,417.40/21,275.92 = 8,343.76/x
  3. Step 3: Cross multiply
    15,417.40x = 21,275.92 × 8,343.76
  4. Step 4: Simplify right side
    15,417.40x = 177,521,170.26
  5. Step 5: Solve for x
    x = 177,521,170.26/15,417.40
  6. Step 6: Final answer
    x = 11,514.34

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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.