Home / 28,309.16-39,067.39-15,389.30

Finding the Fourth Proportional to 28,309.16, 39,067.39 and 15,389.30

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Solution

The fourth proportional to 28,309.16, 39,067.39 and 15,389.30 is: 21,237.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,309.16 : 39,067.39 = 15,389.30 : x
  2. Step 2: Convert to fraction form
    28,309.16/39,067.39 = 15,389.30/x
  3. Step 3: Cross multiply
    28,309.16x = 39,067.39 × 15,389.30
  4. Step 4: Simplify right side
    28,309.16x = 601,219,748.67
  5. Step 5: Solve for x
    x = 601,219,748.67/28,309.16
  6. Step 6: Final answer
    x = 21,237.64

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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.