Home / 28,398.08-39,189.61-15,651.72

Finding the Fourth Proportional to 28,398.08, 39,189.61 and 15,651.72

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Solution

The fourth proportional to 28,398.08, 39,189.61 and 15,651.72 is: 21,599.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,398.08 : 39,189.61 = 15,651.72 : x
  2. Step 2: Convert to fraction form
    28,398.08/39,189.61 = 15,651.72/x
  3. Step 3: Cross multiply
    28,398.08x = 39,189.61 × 15,651.72
  4. Step 4: Simplify right side
    28,398.08x = 613,384,606.68
  5. Step 5: Solve for x
    x = 613,384,606.68/28,398.08
  6. Step 6: Final answer
    x = 21,599.51

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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.