Home / 28,190.25-38,903.76-15,615

Finding the Fourth Proportional to 28,190.25, 38,903.76 and 15,615

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Solution

The fourth proportional to 28,190.25, 38,903.76 and 15,615 is: 21,549.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,190.25 : 38,903.76 = 15,615 : x
  2. Step 2: Convert to fraction form
    28,190.25/38,903.76 = 15,615/x
  3. Step 3: Cross multiply
    28,190.25x = 38,903.76 × 15,615
  4. Step 4: Simplify right side
    28,190.25x = 607,482,212.40
  5. Step 5: Solve for x
    x = 607,482,212.40/28,190.25
  6. Step 6: Final answer
    x = 21,549.37

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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.