Home / 7,223.20-9,969.84-4,080.40

Finding the Fourth Proportional to 7,223.20, 9,969.84 and 4,080.40

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Solution

The fourth proportional to 7,223.20, 9,969.84 and 4,080.40 is: 5,631.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,223.20 : 9,969.84 = 4,080.40 : x
  2. Step 2: Convert to fraction form
    7,223.20/9,969.84 = 4,080.40/x
  3. Step 3: Cross multiply
    7,223.20x = 9,969.84 × 4,080.40
  4. Step 4: Simplify right side
    7,223.20x = 40,680,935.14
  5. Step 5: Solve for x
    x = 40,680,935.14/7,223.20
  6. Step 6: Final answer
    x = 5,631.98

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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.