Home / 11,389.60-15,694.32-8,400.70

Finding the Fourth Proportional to 11,389.60, 15,694.32 and 8,400.70

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Solution

The fourth proportional to 11,389.60, 15,694.32 and 8,400.70 is: 11,575.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,389.60 : 15,694.32 = 8,400.70 : x
  2. Step 2: Convert to fraction form
    11,389.60/15,694.32 = 8,400.70/x
  3. Step 3: Cross multiply
    11,389.60x = 15,694.32 × 8,400.70
  4. Step 4: Simplify right side
    11,389.60x = 131,843,274.02
  5. Step 5: Solve for x
    x = 131,843,274.02/11,389.60
  6. Step 6: Final answer
    x = 11,575.76

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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.