Home / 28,156.33-38,855.73-15,581.08

Finding the Fourth Proportional to 28,156.33, 38,855.73 and 15,581.08

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Solution

The fourth proportional to 28,156.33, 38,855.73 and 15,581.08 is: 21,501.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,156.33 : 38,855.73 = 15,581.08 : x
  2. Step 2: Convert to fraction form
    28,156.33/38,855.73 = 15,581.08/x
  3. Step 3: Cross multiply
    28,156.33x = 38,855.73 × 15,581.08
  4. Step 4: Simplify right side
    28,156.33x = 605,414,237.59
  5. Step 5: Solve for x
    x = 605,414,237.59/28,156.33
  6. Step 6: Final answer
    x = 21,501.89

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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.