Home / 5,126.55-7,689.37-1,428.70

Finding the Fourth Proportional to 5,126.55, 7,689.37 and 1,428.70

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Solution

The fourth proportional to 5,126.55, 7,689.37 and 1,428.70 is: 2,142.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,126.55 : 7,689.37 = 1,428.70 : x
  2. Step 2: Convert to fraction form
    5,126.55/7,689.37 = 1,428.70/x
  3. Step 3: Cross multiply
    5,126.55x = 7,689.37 × 1,428.70
  4. Step 4: Simplify right side
    5,126.55x = 10,985,802.92
  5. Step 5: Solve for x
    x = 10,985,802.92/5,126.55
  6. Step 6: Final answer
    x = 2,142.92

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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.