Home / 21,498.75-29,668.55-11,938.86

Finding the Fourth Proportional to 21,498.75, 29,668.55 and 11,938.86

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Solution

The fourth proportional to 21,498.75, 29,668.55 and 11,938.86 is: 16,475.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,498.75 : 29,668.55 = 11,938.86 : x
  2. Step 2: Convert to fraction form
    21,498.75/29,668.55 = 11,938.86/x
  3. Step 3: Cross multiply
    21,498.75x = 29,668.55 × 11,938.86
  4. Step 4: Simplify right side
    21,498.75x = 354,208,605.16
  5. Step 5: Solve for x
    x = 354,208,605.16/21,498.75
  6. Step 6: Final answer
    x = 16,475.78

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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.