Home / 31,388.59-43,298.16-18,806.05

Finding the Fourth Proportional to 31,388.59, 43,298.16 and 18,806.05

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Solution

The fourth proportional to 31,388.59, 43,298.16 and 18,806.05 is: 25,941.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,388.59 : 43,298.16 = 18,806.05 : x
  2. Step 2: Convert to fraction form
    31,388.59/43,298.16 = 18,806.05/x
  3. Step 3: Cross multiply
    31,388.59x = 43,298.16 × 18,806.05
  4. Step 4: Simplify right side
    31,388.59x = 814,267,361.87
  5. Step 5: Solve for x
    x = 814,267,361.87/31,388.59
  6. Step 6: Final answer
    x = 25,941.51

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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.