Home / 20,314.81-28,034.85-11,361.34

Finding the Fourth Proportional to 20,314.81, 28,034.85 and 11,361.34

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Solution

The fourth proportional to 20,314.81, 28,034.85 and 11,361.34 is: 15,678.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,314.81 : 28,034.85 = 11,361.34 : x
  2. Step 2: Convert to fraction form
    20,314.81/28,034.85 = 11,361.34/x
  3. Step 3: Cross multiply
    20,314.81x = 28,034.85 × 11,361.34
  4. Step 4: Simplify right side
    20,314.81x = 318,513,462.70
  5. Step 5: Solve for x
    x = 318,513,462.70/20,314.81
  6. Step 6: Final answer
    x = 15,678.88

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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.