Home / 20,868.64-31,344.11-17,931.07

Finding the Fourth Proportional to 20,868.64, 31,344.11 and 17,931.07

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Solution

The fourth proportional to 20,868.64, 31,344.11 and 17,931.07 is: 26,931.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.64 : 31,344.11 = 17,931.07 : x
  2. Step 2: Convert to fraction form
    20,868.64/31,344.11 = 17,931.07/x
  3. Step 3: Cross multiply
    20,868.64x = 31,344.11 × 17,931.07
  4. Step 4: Simplify right side
    20,868.64x = 562,033,273.78
  5. Step 5: Solve for x
    x = 562,033,273.78/20,868.64
  6. Step 6: Final answer
    x = 26,931.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.