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Finding the Fourth Proportional to 15,751.80, 23,627.70 and 12,871.80

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Solution

The fourth proportional to 15,751.80, 23,627.70 and 12,871.80 is: 19,307.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,751.80 : 23,627.70 = 12,871.80 : x
  2. Step 2: Convert to fraction form
    15,751.80/23,627.70 = 12,871.80/x
  3. Step 3: Cross multiply
    15,751.80x = 23,627.70 × 12,871.80
  4. Step 4: Simplify right side
    15,751.80x = 304,131,028.86
  5. Step 5: Solve for x
    x = 304,131,028.86/15,751.80
  6. Step 6: Final answer
    x = 19,307.70

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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.