Home / 15,215.83-20,917.23-13,083.55

Finding the Fourth Proportional to 15,215.83, 20,917.23 and 13,083.55

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Solution

The fourth proportional to 15,215.83, 20,917.23 and 13,083.55 is: 17,985.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,215.83 : 20,917.23 = 13,083.55 : x
  2. Step 2: Convert to fraction form
    15,215.83/20,917.23 = 13,083.55/x
  3. Step 3: Cross multiply
    15,215.83x = 20,917.23 × 13,083.55
  4. Step 4: Simplify right side
    15,215.83x = 273,671,454.56
  5. Step 5: Solve for x
    x = 273,671,454.56/15,215.83
  6. Step 6: Final answer
    x = 17,985.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.