Home / 15,514.18-21,409.55-8,440.55

Finding the Fourth Proportional to 15,514.18, 21,409.55 and 8,440.55

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Solution

The fourth proportional to 15,514.18, 21,409.55 and 8,440.55 is: 11,647.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,514.18 : 21,409.55 = 8,440.55 : x
  2. Step 2: Convert to fraction form
    15,514.18/21,409.55 = 8,440.55/x
  3. Step 3: Cross multiply
    15,514.18x = 21,409.55 × 8,440.55
  4. Step 4: Simplify right side
    15,514.18x = 180,708,339.94
  5. Step 5: Solve for x
    x = 180,708,339.94/15,514.18
  6. Step 6: Final answer
    x = 11,647.95

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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.