Home / 5,320.46-7,985.60-2,689.81

Finding the Fourth Proportional to 5,320.46, 7,985.60 and 2,689.81

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Solution

The fourth proportional to 5,320.46, 7,985.60 and 2,689.81 is: 4,037.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,320.46 : 7,985.60 = 2,689.81 : x
  2. Step 2: Convert to fraction form
    5,320.46/7,985.60 = 2,689.81/x
  3. Step 3: Cross multiply
    5,320.46x = 7,985.60 × 2,689.81
  4. Step 4: Simplify right side
    5,320.46x = 21,479,746.74
  5. Step 5: Solve for x
    x = 21,479,746.74/5,320.46
  6. Step 6: Final answer
    x = 4,037.20

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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.