Home / 5,213.68-7,820.76-1,318.12

Finding the Fourth Proportional to 5,213.68, 7,820.76 and 1,318.12

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Solution

The fourth proportional to 5,213.68, 7,820.76 and 1,318.12 is: 1,977.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,213.68 : 7,820.76 = 1,318.12 : x
  2. Step 2: Convert to fraction form
    5,213.68/7,820.76 = 1,318.12/x
  3. Step 3: Cross multiply
    5,213.68x = 7,820.76 × 1,318.12
  4. Step 4: Simplify right side
    5,213.68x = 10,308,700.17
  5. Step 5: Solve for x
    x = 10,308,700.17/5,213.68
  6. Step 6: Final answer
    x = 1,977.24

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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.