Home / 31,467.15-43,420.86-18,720.72

Finding the Fourth Proportional to 31,467.15, 43,420.86 and 18,720.72

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Solution

The fourth proportional to 31,467.15, 43,420.86 and 18,720.72 is: 25,832.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,467.15 : 43,420.86 = 18,720.72 : x
  2. Step 2: Convert to fraction form
    31,467.15/43,420.86 = 18,720.72/x
  3. Step 3: Cross multiply
    31,467.15x = 43,420.86 × 18,720.72
  4. Step 4: Simplify right side
    31,467.15x = 812,869,762.22
  5. Step 5: Solve for x
    x = 812,869,762.22/31,467.15
  6. Step 6: Final answer
    x = 25,832.33

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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.