Home / 15,124.89-20,872.71-8,410.80

Finding the Fourth Proportional to 15,124.89, 20,872.71 and 8,410.80

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Solution

The fourth proportional to 15,124.89, 20,872.71 and 8,410.80 is: 11,607.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,124.89 : 20,872.71 = 8,410.80 : x
  2. Step 2: Convert to fraction form
    15,124.89/20,872.71 = 8,410.80/x
  3. Step 3: Cross multiply
    15,124.89x = 20,872.71 × 8,410.80
  4. Step 4: Simplify right side
    15,124.89x = 175,556,189.27
  5. Step 5: Solve for x
    x = 175,556,189.27/15,124.89
  6. Step 6: Final answer
    x = 11,607.11

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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.