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Finding the Fourth Proportional to 9,259.61, 12,778.12 and 5,280.78

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Solution

The fourth proportional to 9,259.61, 12,778.12 and 5,280.78 is: 7,287.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,259.61 : 12,778.12 = 5,280.78 : x
  2. Step 2: Convert to fraction form
    9,259.61/12,778.12 = 5,280.78/x
  3. Step 3: Cross multiply
    9,259.61x = 12,778.12 × 5,280.78
  4. Step 4: Simplify right side
    9,259.61x = 67,478,440.53
  5. Step 5: Solve for x
    x = 67,478,440.53/9,259.61
  6. Step 6: Final answer
    x = 7,287.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.