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Finding the Fourth Proportional to 15,135.07, 20,887.07 and 12,612.96

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Solution

The fourth proportional to 15,135.07, 20,887.07 and 12,612.96 is: 17,406.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,135.07 : 20,887.07 = 12,612.96 : x
  2. Step 2: Convert to fraction form
    15,135.07/20,887.07 = 12,612.96/x
  3. Step 3: Cross multiply
    15,135.07x = 20,887.07 × 12,612.96
  4. Step 4: Simplify right side
    15,135.07x = 263,447,778.43
  5. Step 5: Solve for x
    x = 263,447,778.43/15,135.07
  6. Step 6: Final answer
    x = 17,406.45

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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.