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Finding the Fourth Proportional to 15,756.75, 21,747.51 and 9,046.99

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Solution

The fourth proportional to 15,756.75, 21,747.51 and 9,046.99 is: 12,486.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,756.75 : 21,747.51 = 9,046.99 : x
  2. Step 2: Convert to fraction form
    15,756.75/21,747.51 = 9,046.99/x
  3. Step 3: Cross multiply
    15,756.75x = 21,747.51 × 9,046.99
  4. Step 4: Simplify right side
    15,756.75x = 196,749,558.12
  5. Step 5: Solve for x
    x = 196,749,558.12/15,756.75
  6. Step 6: Final answer
    x = 12,486.68

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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.