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Finding the Fourth Proportional to 21,033.53, 31,541.06 and 7,876.67

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Solution

The fourth proportional to 21,033.53, 31,541.06 and 7,876.67 is: 11,811.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,033.53 : 31,541.06 = 7,876.67 : x
  2. Step 2: Convert to fraction form
    21,033.53/31,541.06 = 7,876.67/x
  3. Step 3: Cross multiply
    21,033.53x = 31,541.06 × 7,876.67
  4. Step 4: Simplify right side
    21,033.53x = 248,438,560.54
  5. Step 5: Solve for x
    x = 248,438,560.54/21,033.53
  6. Step 6: Final answer
    x = 11,811.55

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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.