Home / 20,888.76-31,334.16-7,738.05

Finding the Fourth Proportional to 20,888.76, 31,334.16 and 7,738.05

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Solution

The fourth proportional to 20,888.76, 31,334.16 and 7,738.05 is: 11,607.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,888.76 : 31,334.16 = 7,738.05 : x
  2. Step 2: Convert to fraction form
    20,888.76/31,334.16 = 7,738.05/x
  3. Step 3: Cross multiply
    20,888.76x = 31,334.16 × 7,738.05
  4. Step 4: Simplify right side
    20,888.76x = 242,465,296.79
  5. Step 5: Solve for x
    x = 242,465,296.79/20,888.76
  6. Step 6: Final answer
    x = 11,607.45

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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.