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Finding the Fourth Proportional to 10,135.80, 15,203.70 and 8,021.70

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Solution

The fourth proportional to 10,135.80, 15,203.70 and 8,021.70 is: 12,032.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,135.80 : 15,203.70 = 8,021.70 : x
  2. Step 2: Convert to fraction form
    10,135.80/15,203.70 = 8,021.70/x
  3. Step 3: Cross multiply
    10,135.80x = 15,203.70 × 8,021.70
  4. Step 4: Simplify right side
    10,135.80x = 121,959,520.29
  5. Step 5: Solve for x
    x = 121,959,520.29/10,135.80
  6. Step 6: Final answer
    x = 12,032.55

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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.