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Finding the Fourth Proportional to 15,756.62, 21,744.59 and 8,683.49

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Solution

The fourth proportional to 15,756.62, 21,744.59 and 8,683.49 is: 11,983.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,756.62 : 21,744.59 = 8,683.49 : x
  2. Step 2: Convert to fraction form
    15,756.62/21,744.59 = 8,683.49/x
  3. Step 3: Cross multiply
    15,756.62x = 21,744.59 × 8,683.49
  4. Step 4: Simplify right side
    15,756.62x = 188,818,940.76
  5. Step 5: Solve for x
    x = 188,818,940.76/15,756.62
  6. Step 6: Final answer
    x = 11,983.47

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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.