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Finding the Fourth Proportional to 18,750.50, 28,110.90 and 8,887.40

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Solution

The fourth proportional to 18,750.50, 28,110.90 and 8,887.40 is: 13,324.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,750.50 : 28,110.90 = 8,887.40 : x
  2. Step 2: Convert to fraction form
    18,750.50/28,110.90 = 8,887.40/x
  3. Step 3: Cross multiply
    18,750.50x = 28,110.90 × 8,887.40
  4. Step 4: Simplify right side
    18,750.50x = 249,832,812.66
  5. Step 5: Solve for x
    x = 249,832,812.66/18,750.50
  6. Step 6: Final answer
    x = 13,324.06

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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.