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Finding the Fourth Proportional to 8,261.95, 12,392.95 and 5,807.75

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Solution

The fourth proportional to 8,261.95, 12,392.95 and 5,807.75 is: 8,711.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,261.95 : 12,392.95 = 5,807.75 : x
  2. Step 2: Convert to fraction form
    8,261.95/12,392.95 = 5,807.75/x
  3. Step 3: Cross multiply
    8,261.95x = 12,392.95 × 5,807.75
  4. Step 4: Simplify right side
    8,261.95x = 71,975,155.36
  5. Step 5: Solve for x
    x = 71,975,155.36/8,261.95
  6. Step 6: Final answer
    x = 8,711.64

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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.