Home / 15,112.72-20,858.90-8,400.66

Finding the Fourth Proportional to 15,112.72, 20,858.90 and 8,400.66

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Solution

The fourth proportional to 15,112.72, 20,858.90 and 8,400.66 is: 11,594.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,112.72 : 20,858.90 = 8,400.66 : x
  2. Step 2: Convert to fraction form
    15,112.72/20,858.90 = 8,400.66/x
  3. Step 3: Cross multiply
    15,112.72x = 20,858.90 × 8,400.66
  4. Step 4: Simplify right side
    15,112.72x = 175,228,526.87
  5. Step 5: Solve for x
    x = 175,228,526.87/15,112.72
  6. Step 6: Final answer
    x = 11,594.77

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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.