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Finding the Fourth Proportional to 13,887.40, 20,852.70 and 8,055.40

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Solution

The fourth proportional to 13,887.40, 20,852.70 and 8,055.40 is: 12,095.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,887.40 : 20,852.70 = 8,055.40 : x
  2. Step 2: Convert to fraction form
    13,887.40/20,852.70 = 8,055.40/x
  3. Step 3: Cross multiply
    13,887.40x = 20,852.70 × 8,055.40
  4. Step 4: Simplify right side
    13,887.40x = 167,976,839.58
  5. Step 5: Solve for x
    x = 167,976,839.58/13,887.40
  6. Step 6: Final answer
    x = 12,095.63

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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.