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Finding the Fourth Proportional to 6,667.20, 9,981.60 and 6,667.20

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Solution

The fourth proportional to 6,667.20, 9,981.60 and 6,667.20 is: 9,981.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,667.20 : 9,981.60 = 6,667.20 : x
  2. Step 2: Convert to fraction form
    6,667.20/9,981.60 = 6,667.20/x
  3. Step 3: Cross multiply
    6,667.20x = 9,981.60 × 6,667.20
  4. Step 4: Simplify right side
    6,667.20x = 66,549,323.52
  5. Step 5: Solve for x
    x = 66,549,323.52/6,667.20
  6. Step 6: Final answer
    x = 9,981.60

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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.