Home / 15,087.24-20,820.40-8,372.87

Finding the Fourth Proportional to 15,087.24, 20,820.40 and 8,372.87

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Solution

The fourth proportional to 15,087.24, 20,820.40 and 8,372.87 is: 11,554.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,087.24 : 20,820.40 = 8,372.87 : x
  2. Step 2: Convert to fraction form
    15,087.24/20,820.40 = 8,372.87/x
  3. Step 3: Cross multiply
    15,087.24x = 20,820.40 × 8,372.87
  4. Step 4: Simplify right side
    15,087.24x = 174,326,455.59
  5. Step 5: Solve for x
    x = 174,326,455.59/15,087.24
  6. Step 6: Final answer
    x = 11,554.57

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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.