Home / 7,114.12-9,816.58-3,970.44

Finding the Fourth Proportional to 7,114.12, 9,816.58 and 3,970.44

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Solution

The fourth proportional to 7,114.12, 9,816.58 and 3,970.44 is: 5,478.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,114.12 : 9,816.58 = 3,970.44 : x
  2. Step 2: Convert to fraction form
    7,114.12/9,816.58 = 3,970.44/x
  3. Step 3: Cross multiply
    7,114.12x = 9,816.58 × 3,970.44
  4. Step 4: Simplify right side
    7,114.12x = 38,976,141.90
  5. Step 5: Solve for x
    x = 38,976,141.90/7,114.12
  6. Step 6: Final answer
    x = 5,478.70

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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.