Home / 31,820.10-43,909.15-18,392.22

Finding the Fourth Proportional to 31,820.10, 43,909.15 and 18,392.22

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Solution

The fourth proportional to 31,820.10, 43,909.15 and 18,392.22 is: 25,379.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,820.10 : 43,909.15 = 18,392.22 : x
  2. Step 2: Convert to fraction form
    31,820.10/43,909.15 = 18,392.22/x
  3. Step 3: Cross multiply
    31,820.10x = 43,909.15 × 18,392.22
  4. Step 4: Simplify right side
    31,820.10x = 807,586,746.81
  5. Step 5: Solve for x
    x = 807,586,746.81/31,820.10
  6. Step 6: Final answer
    x = 25,379.77

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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.