Home / 15,508.19-21,347.28-13,515.29

Finding the Fourth Proportional to 15,508.19, 21,347.28 and 13,515.29

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Solution

The fourth proportional to 15,508.19, 21,347.28 and 13,515.29 is: 18,604.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,508.19 : 21,347.28 = 13,515.29 : x
  2. Step 2: Convert to fraction form
    15,508.19/21,347.28 = 13,515.29/x
  3. Step 3: Cross multiply
    15,508.19x = 21,347.28 × 13,515.29
  4. Step 4: Simplify right side
    15,508.19x = 288,514,679.91
  5. Step 5: Solve for x
    x = 288,514,679.91/15,508.19
  6. Step 6: Final answer
    x = 18,604.02

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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.