Home / 28,450.64-39,240.05-21,758.42

Finding the Fourth Proportional to 28,450.64, 39,240.05 and 21,758.42

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Solution

The fourth proportional to 28,450.64, 39,240.05 and 21,758.42 is: 30,009.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,450.64 : 39,240.05 = 21,758.42 : x
  2. Step 2: Convert to fraction form
    28,450.64/39,240.05 = 21,758.42/x
  3. Step 3: Cross multiply
    28,450.64x = 39,240.05 × 21,758.42
  4. Step 4: Simplify right side
    28,450.64x = 853,801,478.03
  5. Step 5: Solve for x
    x = 853,801,478.03/28,450.64
  6. Step 6: Final answer
    x = 30,009.92

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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.