Home / 5,126.05-7,688.62-1,428.20

Finding the Fourth Proportional to 5,126.05, 7,688.62 and 1,428.20

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Solution

The fourth proportional to 5,126.05, 7,688.62 and 1,428.20 is: 2,142.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,126.05 : 7,688.62 = 1,428.20 : x
  2. Step 2: Convert to fraction form
    5,126.05/7,688.62 = 1,428.20/x
  3. Step 3: Cross multiply
    5,126.05x = 7,688.62 × 1,428.20
  4. Step 4: Simplify right side
    5,126.05x = 10,980,887.08
  5. Step 5: Solve for x
    x = 10,980,887.08/5,126.05
  6. Step 6: Final answer
    x = 2,142.17

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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.