Home / 20,606.32-28,436.40-11,174.80

Finding the Fourth Proportional to 20,606.32, 28,436.40 and 11,174.80

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Solution

The fourth proportional to 20,606.32, 28,436.40 and 11,174.80 is: 15,421.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,606.32 : 28,436.40 = 11,174.80 : x
  2. Step 2: Convert to fraction form
    20,606.32/28,436.40 = 11,174.80/x
  3. Step 3: Cross multiply
    20,606.32x = 28,436.40 × 11,174.80
  4. Step 4: Simplify right side
    20,606.32x = 317,771,082.72
  5. Step 5: Solve for x
    x = 317,771,082.72/20,606.32
  6. Step 6: Final answer
    x = 15,421.05

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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.