Home / 9,981.90-13,780.67-6,630.46

Finding the Fourth Proportional to 9,981.90, 13,780.67 and 6,630.46

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Solution

The fourth proportional to 9,981.90, 13,780.67 and 6,630.46 is: 9,153.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,981.90 : 13,780.67 = 6,630.46 : x
  2. Step 2: Convert to fraction form
    9,981.90/13,780.67 = 6,630.46/x
  3. Step 3: Cross multiply
    9,981.90x = 13,780.67 × 6,630.46
  4. Step 4: Simplify right side
    9,981.90x = 91,372,113.60
  5. Step 5: Solve for x
    x = 91,372,113.60/9,981.90
  6. Step 6: Final answer
    x = 9,153.78

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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.