Home / 31,389.09-43,298.85-18,806.55

Finding the Fourth Proportional to 31,389.09, 43,298.85 and 18,806.55

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Solution

The fourth proportional to 31,389.09, 43,298.85 and 18,806.55 is: 25,942.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,389.09 : 43,298.85 = 18,806.55 : x
  2. Step 2: Convert to fraction form
    31,389.09/43,298.85 = 18,806.55/x
  3. Step 3: Cross multiply
    31,389.09x = 43,298.85 × 18,806.55
  4. Step 4: Simplify right side
    31,389.09x = 814,301,987.47
  5. Step 5: Solve for x
    x = 814,301,987.47/31,389.09
  6. Step 6: Final answer
    x = 25,942.20

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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.