Home / 28,240.88-38,977.08-15,669.68

Finding the Fourth Proportional to 28,240.88, 38,977.08 and 15,669.68

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Solution

The fourth proportional to 28,240.88, 38,977.08 and 15,669.68 is: 21,626.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,240.88 : 38,977.08 = 15,669.68 : x
  2. Step 2: Convert to fraction form
    28,240.88/38,977.08 = 15,669.68/x
  3. Step 3: Cross multiply
    28,240.88x = 38,977.08 × 15,669.68
  4. Step 4: Simplify right side
    28,240.88x = 610,758,370.93
  5. Step 5: Solve for x
    x = 610,758,370.93/28,240.88
  6. Step 6: Final answer
    x = 21,626.75

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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.