Home / 21,255.18-29,328.15-11,823.75

Finding the Fourth Proportional to 21,255.18, 29,328.15 and 11,823.75

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Solution

The fourth proportional to 21,255.18, 29,328.15 and 11,823.75 is: 16,314.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,255.18 : 29,328.15 = 11,823.75 : x
  2. Step 2: Convert to fraction form
    21,255.18/29,328.15 = 11,823.75/x
  3. Step 3: Cross multiply
    21,255.18x = 29,328.15 × 11,823.75
  4. Step 4: Simplify right side
    21,255.18x = 346,768,713.56
  5. Step 5: Solve for x
    x = 346,768,713.56/21,255.18
  6. Step 6: Final answer
    x = 16,314.55

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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.