Home / 13,752.18-18,974.86-7,782.55

Finding the Fourth Proportional to 13,752.18, 18,974.86 and 7,782.55

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Solution

The fourth proportional to 13,752.18, 18,974.86 and 7,782.55 is: 10,738.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,752.18 : 18,974.86 = 7,782.55 : x
  2. Step 2: Convert to fraction form
    13,752.18/18,974.86 = 7,782.55/x
  3. Step 3: Cross multiply
    13,752.18x = 18,974.86 × 7,782.55
  4. Step 4: Simplify right side
    13,752.18x = 147,672,729.80
  5. Step 5: Solve for x
    x = 147,672,729.80/13,752.18
  6. Step 6: Final answer
    x = 10,738.13

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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.