Home / 7,116.20-9,820.47-3,929.57

Finding the Fourth Proportional to 7,116.20, 9,820.47 and 3,929.57

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Solution

The fourth proportional to 7,116.20, 9,820.47 and 3,929.57 is: 5,422.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,116.20 : 9,820.47 = 3,929.57 : x
  2. Step 2: Convert to fraction form
    7,116.20/9,820.47 = 3,929.57/x
  3. Step 3: Cross multiply
    7,116.20x = 9,820.47 × 3,929.57
  4. Step 4: Simplify right side
    7,116.20x = 38,590,175.20
  5. Step 5: Solve for x
    x = 38,590,175.20/7,116.20
  6. Step 6: Final answer
    x = 5,422.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.