Home / 28,403.64-39,198.78-15,656.76

Finding the Fourth Proportional to 28,403.64, 39,198.78 and 15,656.76

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Solution

The fourth proportional to 28,403.64, 39,198.78 and 15,656.76 is: 21,607.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,403.64 : 39,198.78 = 15,656.76 : x
  2. Step 2: Convert to fraction form
    28,403.64/39,198.78 = 15,656.76/x
  3. Step 3: Cross multiply
    28,403.64x = 39,198.78 × 15,656.76
  4. Step 4: Simplify right side
    28,403.64x = 613,725,890.75
  5. Step 5: Solve for x
    x = 613,725,890.75/28,403.64
  6. Step 6: Final answer
    x = 21,607.30

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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.