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Finding the Fourth Proportional to 15,039.56, 20,756.13 and 8,666.39

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Solution

The fourth proportional to 15,039.56, 20,756.13 and 8,666.39 is: 11,960.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,039.56 : 20,756.13 = 8,666.39 : x
  2. Step 2: Convert to fraction form
    15,039.56/20,756.13 = 8,666.39/x
  3. Step 3: Cross multiply
    15,039.56x = 20,756.13 × 8,666.39
  4. Step 4: Simplify right side
    15,039.56x = 179,880,717.47
  5. Step 5: Solve for x
    x = 179,880,717.47/15,039.56
  6. Step 6: Final answer
    x = 11,960.50

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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.