Home / 18,931.35-26,149.92-15,359.58

Finding the Fourth Proportional to 18,931.35, 26,149.92 and 15,359.58

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Solution

The fourth proportional to 18,931.35, 26,149.92 and 15,359.58 is: 21,216.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,931.35 : 26,149.92 = 15,359.58 : x
  2. Step 2: Convert to fraction form
    18,931.35/26,149.92 = 15,359.58/x
  3. Step 3: Cross multiply
    18,931.35x = 26,149.92 × 15,359.58
  4. Step 4: Simplify right side
    18,931.35x = 401,651,788.23
  5. Step 5: Solve for x
    x = 401,651,788.23/18,931.35
  6. Step 6: Final answer
    x = 21,216.23

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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.