Home / 15,514.29-21,409.60-8,440.72

Finding the Fourth Proportional to 15,514.29, 21,409.60 and 8,440.72

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Solution

The fourth proportional to 15,514.29, 21,409.60 and 8,440.72 is: 11,648.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,514.29 : 21,409.60 = 8,440.72 : x
  2. Step 2: Convert to fraction form
    15,514.29/21,409.60 = 8,440.72/x
  3. Step 3: Cross multiply
    15,514.29x = 21,409.60 × 8,440.72
  4. Step 4: Simplify right side
    15,514.29x = 180,712,438.91
  5. Step 5: Solve for x
    x = 180,712,438.91/15,514.29
  6. Step 6: Final answer
    x = 11,648.13

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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.