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Finding the Fourth Proportional to 7,851.80, 10,845.06 and 5,871.12

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Solution

The fourth proportional to 7,851.80, 10,845.06 and 5,871.12 is: 8,109.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,851.80 : 10,845.06 = 5,871.12 : x
  2. Step 2: Convert to fraction form
    7,851.80/10,845.06 = 5,871.12/x
  3. Step 3: Cross multiply
    7,851.80x = 10,845.06 × 5,871.12
  4. Step 4: Simplify right side
    7,851.80x = 63,672,648.67
  5. Step 5: Solve for x
    x = 63,672,648.67/7,851.80
  6. Step 6: Final answer
    x = 8,109.31

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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.