Home / 28,238.56-38,967.92-15,663.20

Finding the Fourth Proportional to 28,238.56, 38,967.92 and 15,663.20

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Solution

The fourth proportional to 28,238.56, 38,967.92 and 15,663.20 is: 21,614.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,238.56 : 38,967.92 = 15,663.20 : x
  2. Step 2: Convert to fraction form
    28,238.56/38,967.92 = 15,663.20/x
  3. Step 3: Cross multiply
    28,238.56x = 38,967.92 × 15,663.20
  4. Step 4: Simplify right side
    28,238.56x = 610,362,324.54
  5. Step 5: Solve for x
    x = 610,362,324.54/28,238.56
  6. Step 6: Final answer
    x = 21,614.50

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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.