Home / 28,362.06-39,139.74-15,615

Finding the Fourth Proportional to 28,362.06, 39,139.74 and 15,615

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Solution

The fourth proportional to 28,362.06, 39,139.74 and 15,615 is: 21,548.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,362.06 : 39,139.74 = 15,615 : x
  2. Step 2: Convert to fraction form
    28,362.06/39,139.74 = 15,615/x
  3. Step 3: Cross multiply
    28,362.06x = 39,139.74 × 15,615
  4. Step 4: Simplify right side
    28,362.06x = 611,167,040.10
  5. Step 5: Solve for x
    x = 611,167,040.10/28,362.06
  6. Step 6: Final answer
    x = 21,548.75

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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.