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Finding the Fourth Proportional to 28,693.20, 43,039.80 and 25,631.40

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Solution

The fourth proportional to 28,693.20, 43,039.80 and 25,631.40 is: 38,447.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,693.20 : 43,039.80 = 25,631.40 : x
  2. Step 2: Convert to fraction form
    28,693.20/43,039.80 = 25,631.40/x
  3. Step 3: Cross multiply
    28,693.20x = 43,039.80 × 25,631.40
  4. Step 4: Simplify right side
    28,693.20x = 1,103,170,329.72
  5. Step 5: Solve for x
    x = 1,103,170,329.72/28,693.20
  6. Step 6: Final answer
    x = 38,447.10

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1.5x scale

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.