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Finding the Fourth Proportional to 14,843.40, 20,487.78 and 8,881.80

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Solution

The fourth proportional to 14,843.40, 20,487.78 and 8,881.80 is: 12,259.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,843.40 : 20,487.78 = 8,881.80 : x
  2. Step 2: Convert to fraction form
    14,843.40/20,487.78 = 8,881.80/x
  3. Step 3: Cross multiply
    14,843.40x = 20,487.78 × 8,881.80
  4. Step 4: Simplify right side
    14,843.40x = 181,968,364.40
  5. Step 5: Solve for x
    x = 181,968,364.40/14,843.40
  6. Step 6: Final answer
    x = 12,259.21

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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.