Home / 31,720.29-47,581.21-10,660.64

Finding the Fourth Proportional to 31,720.29, 47,581.21 and 10,660.64

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Solution

The fourth proportional to 31,720.29, 47,581.21 and 10,660.64 is: 15,991.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,720.29 : 47,581.21 = 10,660.64 : x
  2. Step 2: Convert to fraction form
    31,720.29/47,581.21 = 10,660.64/x
  3. Step 3: Cross multiply
    31,720.29x = 47,581.21 × 10,660.64
  4. Step 4: Simplify right side
    31,720.29x = 507,246,150.57
  5. Step 5: Solve for x
    x = 507,246,150.57/31,720.29
  6. Step 6: Final answer
    x = 15,991.22

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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.