Home / 28,216.31-38,938.29-15,469.34

Finding the Fourth Proportional to 28,216.31, 38,938.29 and 15,469.34

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Solution

The fourth proportional to 28,216.31, 38,938.29 and 15,469.34 is: 21,347.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,216.31 : 38,938.29 = 15,469.34 : x
  2. Step 2: Convert to fraction form
    28,216.31/38,938.29 = 15,469.34/x
  3. Step 3: Cross multiply
    28,216.31x = 38,938.29 × 15,469.34
  4. Step 4: Simplify right side
    28,216.31x = 602,349,394.33
  5. Step 5: Solve for x
    x = 602,349,394.33/28,216.31
  6. Step 6: Final answer
    x = 21,347.56

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Double scale
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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.