Home / 5,123.80-7,070.74-2,885.66

Finding the Fourth Proportional to 5,123.80, 7,070.74 and 2,885.66

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Solution

The fourth proportional to 5,123.80, 7,070.74 and 2,885.66 is: 3,982.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,123.80 : 7,070.74 = 2,885.66 : x
  2. Step 2: Convert to fraction form
    5,123.80/7,070.74 = 2,885.66/x
  3. Step 3: Cross multiply
    5,123.80x = 7,070.74 × 2,885.66
  4. Step 4: Simplify right side
    5,123.80x = 20,403,751.59
  5. Step 5: Solve for x
    x = 20,403,751.59/5,123.80
  6. Step 6: Final answer
    x = 3,982.15

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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.