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Finding the Fourth Proportional to 28,290.40, 42,435.60 and 26,677.60

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Solution

The fourth proportional to 28,290.40, 42,435.60 and 26,677.60 is: 40,016.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,290.40 : 42,435.60 = 26,677.60 : x
  2. Step 2: Convert to fraction form
    28,290.40/42,435.60 = 26,677.60/x
  3. Step 3: Cross multiply
    28,290.40x = 42,435.60 × 26,677.60
  4. Step 4: Simplify right side
    28,290.40x = 1,132,079,962.56
  5. Step 5: Solve for x
    x = 1,132,079,962.56/28,290.40
  6. Step 6: Final answer
    x = 40,016.40

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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.