Home / 28,258.97-38,997.87-15,513.35

Finding the Fourth Proportional to 28,258.97, 38,997.87 and 15,513.35

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Solution

The fourth proportional to 28,258.97, 38,997.87 and 15,513.35 is: 21,408.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,258.97 : 38,997.87 = 15,513.35 : x
  2. Step 2: Convert to fraction form
    28,258.97/38,997.87 = 15,513.35/x
  3. Step 3: Cross multiply
    28,258.97x = 38,997.87 × 15,513.35
  4. Step 4: Simplify right side
    28,258.97x = 604,987,411.58
  5. Step 5: Solve for x
    x = 604,987,411.58/28,258.97
  6. Step 6: Final answer
    x = 21,408.69

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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.