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Finding the Fourth Proportional to 28,042.80, 42,064.20 and 25,904.40

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Solution

The fourth proportional to 28,042.80, 42,064.20 and 25,904.40 is: 38,856.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,042.80 : 42,064.20 = 25,904.40 : x
  2. Step 2: Convert to fraction form
    28,042.80/42,064.20 = 25,904.40/x
  3. Step 3: Cross multiply
    28,042.80x = 42,064.20 × 25,904.40
  4. Step 4: Simplify right side
    28,042.80x = 1,089,647,862.48
  5. Step 5: Solve for x
    x = 1,089,647,862.48/28,042.80
  6. Step 6: Final answer
    x = 38,856.60

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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.