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Finding the Fourth Proportional to 15,991.89, 23,987.62 and 7,220.67

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Solution

The fourth proportional to 15,991.89, 23,987.62 and 7,220.67 is: 10,830.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,991.89 : 23,987.62 = 7,220.67 : x
  2. Step 2: Convert to fraction form
    15,991.89/23,987.62 = 7,220.67/x
  3. Step 3: Cross multiply
    15,991.89x = 23,987.62 × 7,220.67
  4. Step 4: Simplify right side
    15,991.89x = 173,206,688.11
  5. Step 5: Solve for x
    x = 173,206,688.11/15,991.89
  6. Step 6: Final answer
    x = 10,830.91

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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.