Home / 28,351.81-39,123.97-15,775.75

Finding the Fourth Proportional to 28,351.81, 39,123.97 and 15,775.75

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Solution

The fourth proportional to 28,351.81, 39,123.97 and 15,775.75 is: 21,769.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,351.81 : 39,123.97 = 15,775.75 : x
  2. Step 2: Convert to fraction form
    28,351.81/39,123.97 = 15,775.75/x
  3. Step 3: Cross multiply
    28,351.81x = 39,123.97 × 15,775.75
  4. Step 4: Simplify right side
    28,351.81x = 617,209,969.73
  5. Step 5: Solve for x
    x = 617,209,969.73/28,351.81
  6. Step 6: Final answer
    x = 21,769.68

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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.