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Finding the Fourth Proportional to 15,756.66, 21,744.18 and 8,683.07

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Solution

The fourth proportional to 15,756.66, 21,744.18 and 8,683.07 is: 11,982.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,756.66 : 21,744.18 = 8,683.07 : x
  2. Step 2: Convert to fraction form
    15,756.66/21,744.18 = 8,683.07/x
  3. Step 3: Cross multiply
    15,756.66x = 21,744.18 × 8,683.07
  4. Step 4: Simplify right side
    15,756.66x = 188,806,128.31
  5. Step 5: Solve for x
    x = 188,806,128.31/15,756.66
  6. Step 6: Final answer
    x = 11,982.62

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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.