Home / 25,109.10-34,650.45-13,778.78

Finding the Fourth Proportional to 25,109.10, 34,650.45 and 13,778.78

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Solution

The fourth proportional to 25,109.10, 34,650.45 and 13,778.78 is: 19,014.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,109.10 : 34,650.45 = 13,778.78 : x
  2. Step 2: Convert to fraction form
    25,109.10/34,650.45 = 13,778.78/x
  3. Step 3: Cross multiply
    25,109.10x = 34,650.45 × 13,778.78
  4. Step 4: Simplify right side
    25,109.10x = 477,440,927.45
  5. Step 5: Solve for x
    x = 477,440,927.45/25,109.10
  6. Step 6: Final answer
    x = 19,014.66

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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.