Home / 18,891.21-26,070.75-10,931.90

Finding the Fourth Proportional to 18,891.21, 26,070.75 and 10,931.90

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Solution

The fourth proportional to 18,891.21, 26,070.75 and 10,931.90 is: 15,086.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,891.21 : 26,070.75 = 10,931.90 : x
  2. Step 2: Convert to fraction form
    18,891.21/26,070.75 = 10,931.90/x
  3. Step 3: Cross multiply
    18,891.21x = 26,070.75 × 10,931.90
  4. Step 4: Simplify right side
    18,891.21x = 285,002,777.27
  5. Step 5: Solve for x
    x = 285,002,777.27/18,891.21
  6. Step 6: Final answer
    x = 15,086.53

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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.