Home / 20,931.94-31,391.34-6,889.06

Finding the Fourth Proportional to 20,931.94, 31,391.34 and 6,889.06

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Solution

The fourth proportional to 20,931.94, 31,391.34 and 6,889.06 is: 10,331.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,931.94 : 31,391.34 = 6,889.06 : x
  2. Step 2: Convert to fraction form
    20,931.94/31,391.34 = 6,889.06/x
  3. Step 3: Cross multiply
    20,931.94x = 31,391.34 × 6,889.06
  4. Step 4: Simplify right side
    20,931.94x = 216,256,824.74
  5. Step 5: Solve for x
    x = 216,256,824.74/20,931.94
  6. Step 6: Final answer
    x = 10,331.43

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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.