Home / 20,960.16-31,440.72-6,915.68

Finding the Fourth Proportional to 20,960.16, 31,440.72 and 6,915.68

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Solution

The fourth proportional to 20,960.16, 31,440.72 and 6,915.68 is: 10,373.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,960.16 : 31,440.72 = 6,915.68 : x
  2. Step 2: Convert to fraction form
    20,960.16/31,440.72 = 6,915.68/x
  3. Step 3: Cross multiply
    20,960.16x = 31,440.72 × 6,915.68
  4. Step 4: Simplify right side
    20,960.16x = 217,433,958.49
  5. Step 5: Solve for x
    x = 217,433,958.49/20,960.16
  6. Step 6: Final answer
    x = 10,373.68

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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.