Home / 10,487.45-15,731.16-7,190.55

Finding the Fourth Proportional to 10,487.45, 15,731.16 and 7,190.55

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Solution

The fourth proportional to 10,487.45, 15,731.16 and 7,190.55 is: 10,785.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,487.45 : 15,731.16 = 7,190.55 : x
  2. Step 2: Convert to fraction form
    10,487.45/15,731.16 = 7,190.55/x
  3. Step 3: Cross multiply
    10,487.45x = 15,731.16 × 7,190.55
  4. Step 4: Simplify right side
    10,487.45x = 113,115,606.58
  5. Step 5: Solve for x
    x = 113,115,606.58/10,487.45
  6. Step 6: Final answer
    x = 10,785.81

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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.