Home / 28,098.12-42,147.18-7,320

Finding the Fourth Proportional to 28,098.12, 42,147.18 and 7,320

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Solution

The fourth proportional to 28,098.12, 42,147.18 and 7,320 is: 10,980.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,098.12 : 42,147.18 = 7,320 : x
  2. Step 2: Convert to fraction form
    28,098.12/42,147.18 = 7,320/x
  3. Step 3: Cross multiply
    28,098.12x = 42,147.18 × 7,320
  4. Step 4: Simplify right side
    28,098.12x = 308,517,357.60
  5. Step 5: Solve for x
    x = 308,517,357.60/28,098.12
  6. Step 6: Final answer
    x = 10,980.00

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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.