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Finding the Fourth Proportional to 18,747.80, 28,124.40 and 6,268.40

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Solution

The fourth proportional to 18,747.80, 28,124.40 and 6,268.40 is: 9,403.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,747.80 : 28,124.40 = 6,268.40 : x
  2. Step 2: Convert to fraction form
    18,747.80/28,124.40 = 6,268.40/x
  3. Step 3: Cross multiply
    18,747.80x = 28,124.40 × 6,268.40
  4. Step 4: Simplify right side
    18,747.80x = 176,294,988.96
  5. Step 5: Solve for x
    x = 176,294,988.96/18,747.80
  6. Step 6: Final answer
    x = 9,403.50

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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.