Home / 15,011.06-20,716.05-8,638.62

Finding the Fourth Proportional to 15,011.06, 20,716.05 and 8,638.62

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Solution

The fourth proportional to 15,011.06, 20,716.05 and 8,638.62 is: 11,921.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,011.06 : 20,716.05 = 8,638.62 : x
  2. Step 2: Convert to fraction form
    15,011.06/20,716.05 = 8,638.62/x
  3. Step 3: Cross multiply
    15,011.06x = 20,716.05 × 8,638.62
  4. Step 4: Simplify right side
    15,011.06x = 178,958,038.56
  5. Step 5: Solve for x
    x = 178,958,038.56/15,011.06
  6. Step 6: Final answer
    x = 11,921.75

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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.