Home / 7,187.20-10,780.80-6,294.40

Finding the Fourth Proportional to 7,187.20, 10,780.80 and 6,294.40

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Solution

The fourth proportional to 7,187.20, 10,780.80 and 6,294.40 is: 9,441.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,187.20 : 10,780.80 = 6,294.40 : x
  2. Step 2: Convert to fraction form
    7,187.20/10,780.80 = 6,294.40/x
  3. Step 3: Cross multiply
    7,187.20x = 10,780.80 × 6,294.40
  4. Step 4: Simplify right side
    7,187.20x = 67,858,667.52
  5. Step 5: Solve for x
    x = 67,858,667.52/7,187.20
  6. Step 6: Final answer
    x = 9,441.60

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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.