Home / 28,188,728.12-38,905,900.34-18,382,147.04

Finding the Fourth Proportional to 28,188,728.12, 38,905,900.34 and 18,382,147.04

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Solution

The fourth proportional to 28,188,728.12, 38,905,900.34 and 18,382,147.04 is: 25,370,920.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,188,728.12 : 38,905,900.34 = 18,382,147.04 : x
  2. Step 2: Convert to fraction form
    28,188,728.12/38,905,900.34 = 18,382,147.04/x
  3. Step 3: Cross multiply
    28,188,728.12x = 38,905,900.34 × 18,382,147.04
  4. Step 4: Simplify right side
    28,188,728.12x = 715,173,980,487,025.75
  5. Step 5: Solve for x
    x = 715,173,980,487,025.75/28,188,728.12
  6. Step 6: Final answer
    x = 25,370,920.52

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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.