Home / 5,123.55-7,070.26-2,885.40

Finding the Fourth Proportional to 5,123.55, 7,070.26 and 2,885.40

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Solution

The fourth proportional to 5,123.55, 7,070.26 and 2,885.40 is: 3,981.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,123.55 : 7,070.26 = 2,885.40 : x
  2. Step 2: Convert to fraction form
    5,123.55/7,070.26 = 2,885.40/x
  3. Step 3: Cross multiply
    5,123.55x = 7,070.26 × 2,885.40
  4. Step 4: Simplify right side
    5,123.55x = 20,400,528.20
  5. Step 5: Solve for x
    x = 20,400,528.20/5,123.55
  6. Step 6: Final answer
    x = 3,981.72

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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.