Home / 15,518.91-21,416.09-8,445.38

Finding the Fourth Proportional to 15,518.91, 21,416.09 and 8,445.38

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Solution

The fourth proportional to 15,518.91, 21,416.09 and 8,445.38 is: 11,654.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,518.91 : 21,416.09 = 8,445.38 : x
  2. Step 2: Convert to fraction form
    15,518.91/21,416.09 = 8,445.38/x
  3. Step 3: Cross multiply
    15,518.91x = 21,416.09 × 8,445.38
  4. Step 4: Simplify right side
    15,518.91x = 180,866,868.86
  5. Step 5: Solve for x
    x = 180,866,868.86/15,518.91
  6. Step 6: Final answer
    x = 11,654.61

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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.