Home / 12,391.85-18,587.80-8,710.55

Finding the Fourth Proportional to 12,391.85, 18,587.80 and 8,710.55

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Solution

The fourth proportional to 12,391.85, 18,587.80 and 8,710.55 is: 13,065.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,391.85 : 18,587.80 = 8,710.55 : x
  2. Step 2: Convert to fraction form
    12,391.85/18,587.80 = 8,710.55/x
  3. Step 3: Cross multiply
    12,391.85x = 18,587.80 × 8,710.55
  4. Step 4: Simplify right side
    12,391.85x = 161,910,078.00
  5. Step 5: Solve for x
    x = 161,910,078.00/12,391.85
  6. Step 6: Final answer
    x = 13,065.85

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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.