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Finding the Fourth Proportional to 10,839.08, 14,900.47 and 9,321.08

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Solution

The fourth proportional to 10,839.08, 14,900.47 and 9,321.08 is: 12,813.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,839.08 : 14,900.47 = 9,321.08 : x
  2. Step 2: Convert to fraction form
    10,839.08/14,900.47 = 9,321.08/x
  3. Step 3: Cross multiply
    10,839.08x = 14,900.47 × 9,321.08
  4. Step 4: Simplify right side
    10,839.08x = 138,888,351.80
  5. Step 5: Solve for x
    x = 138,888,351.80/10,839.08
  6. Step 6: Final answer
    x = 12,813.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.