Home / 15,229.77-21,015.79-8,516.35

Finding the Fourth Proportional to 15,229.77, 21,015.79 and 8,516.35

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Solution

The fourth proportional to 15,229.77, 21,015.79 and 8,516.35 is: 11,751.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,229.77 : 21,015.79 = 8,516.35 : x
  2. Step 2: Convert to fraction form
    15,229.77/21,015.79 = 8,516.35/x
  3. Step 3: Cross multiply
    15,229.77x = 21,015.79 × 8,516.35
  4. Step 4: Simplify right side
    15,229.77x = 178,977,823.17
  5. Step 5: Solve for x
    x = 178,977,823.17/15,229.77
  6. Step 6: Final answer
    x = 11,751.84

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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.