Home / 28,238.56-38,969.40-15,663.52

Finding the Fourth Proportional to 28,238.56, 38,969.40 and 15,663.52

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Solution

The fourth proportional to 28,238.56, 38,969.40 and 15,663.52 is: 21,615.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,238.56 : 38,969.40 = 15,663.52 : x
  2. Step 2: Convert to fraction form
    28,238.56/38,969.40 = 15,663.52/x
  3. Step 3: Cross multiply
    28,238.56x = 38,969.40 × 15,663.52
  4. Step 4: Simplify right side
    28,238.56x = 610,397,976.29
  5. Step 5: Solve for x
    x = 610,397,976.29/28,238.56
  6. Step 6: Final answer
    x = 21,615.76

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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.