Home / 15,219.70-20,991.56-13,098.71

Finding the Fourth Proportional to 15,219.70, 20,991.56 and 13,098.71

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Solution

The fourth proportional to 15,219.70, 20,991.56 and 13,098.71 is: 18,066.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,219.70 : 20,991.56 = 13,098.71 : x
  2. Step 2: Convert to fraction form
    15,219.70/20,991.56 = 13,098.71/x
  3. Step 3: Cross multiply
    15,219.70x = 20,991.56 × 13,098.71
  4. Step 4: Simplify right side
    15,219.70x = 274,962,343.87
  5. Step 5: Solve for x
    x = 274,962,343.87/15,219.70
  6. Step 6: Final answer
    x = 18,066.22

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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.