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Finding the Fourth Proportional to 8,807.42, 12,153.80 and 4,978.95

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Solution

The fourth proportional to 8,807.42, 12,153.80 and 4,978.95 is: 6,870.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,807.42 : 12,153.80 = 4,978.95 : x
  2. Step 2: Convert to fraction form
    8,807.42/12,153.80 = 4,978.95/x
  3. Step 3: Cross multiply
    8,807.42x = 12,153.80 × 4,978.95
  4. Step 4: Simplify right side
    8,807.42x = 60,513,169.74
  5. Step 5: Solve for x
    x = 60,513,169.74/8,807.42
  6. Step 6: Final answer
    x = 6,870.71

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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.