Home / 5,214.17-7,821.29-1,318.58

Finding the Fourth Proportional to 5,214.17, 7,821.29 and 1,318.58

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Solution

The fourth proportional to 5,214.17, 7,821.29 and 1,318.58 is: 1,977.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,214.17 : 7,821.29 = 1,318.58 : x
  2. Step 2: Convert to fraction form
    5,214.17/7,821.29 = 1,318.58/x
  3. Step 3: Cross multiply
    5,214.17x = 7,821.29 × 1,318.58
  4. Step 4: Simplify right side
    5,214.17x = 10,312,990.09
  5. Step 5: Solve for x
    x = 10,312,990.09/5,214.17
  6. Step 6: Final answer
    x = 1,977.88

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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.