Home / 28,120.52-38,806-15,373.56

Finding the Fourth Proportional to 28,120.52, 38,806 and 15,373.56

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Solution

The fourth proportional to 28,120.52, 38,806 and 15,373.56 is: 21,215.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,120.52 : 38,806 = 15,373.56 : x
  2. Step 2: Convert to fraction form
    28,120.52/38,806 = 15,373.56/x
  3. Step 3: Cross multiply
    28,120.52x = 38,806 × 15,373.56
  4. Step 4: Simplify right side
    28,120.52x = 596,586,369.36
  5. Step 5: Solve for x
    x = 596,586,369.36/28,120.52
  6. Step 6: Final answer
    x = 21,215.34

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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.