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Finding the Fourth Proportional to 28,548.40, 42,822.60 and 11,902.90

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Solution

The fourth proportional to 28,548.40, 42,822.60 and 11,902.90 is: 17,854.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,548.40 : 42,822.60 = 11,902.90 : x
  2. Step 2: Convert to fraction form
    28,548.40/42,822.60 = 11,902.90/x
  3. Step 3: Cross multiply
    28,548.40x = 42,822.60 × 11,902.90
  4. Step 4: Simplify right side
    28,548.40x = 509,713,125.54
  5. Step 5: Solve for x
    x = 509,713,125.54/28,548.40
  6. Step 6: Final answer
    x = 17,854.35

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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.