Home / 12,554.80-18,829.20-7,278.40

Finding the Fourth Proportional to 12,554.80, 18,829.20 and 7,278.40

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Solution

The fourth proportional to 12,554.80, 18,829.20 and 7,278.40 is: 10,915.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,554.80 : 18,829.20 = 7,278.40 : x
  2. Step 2: Convert to fraction form
    12,554.80/18,829.20 = 7,278.40/x
  3. Step 3: Cross multiply
    12,554.80x = 18,829.20 × 7,278.40
  4. Step 4: Simplify right side
    12,554.80x = 137,046,449.28
  5. Step 5: Solve for x
    x = 137,046,449.28/12,554.80
  6. Step 6: Final answer
    x = 10,915.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.