Home / 5,126.15-7,689.23-1,428.39

Finding the Fourth Proportional to 5,126.15, 7,689.23 and 1,428.39

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Solution

The fourth proportional to 5,126.15, 7,689.23 and 1,428.39 is: 2,142.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,126.15 : 7,689.23 = 1,428.39 : x
  2. Step 2: Convert to fraction form
    5,126.15/7,689.23 = 1,428.39/x
  3. Step 3: Cross multiply
    5,126.15x = 7,689.23 × 1,428.39
  4. Step 4: Simplify right side
    5,126.15x = 10,983,219.24
  5. Step 5: Solve for x
    x = 10,983,219.24/5,126.15
  6. Step 6: Final answer
    x = 2,142.59

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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.