Home / 15,487.42-21,371.10-8,771.71

Finding the Fourth Proportional to 15,487.42, 21,371.10 and 8,771.71

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Solution

The fourth proportional to 15,487.42, 21,371.10 and 8,771.71 is: 12,104.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,487.42 : 21,371.10 = 8,771.71 : x
  2. Step 2: Convert to fraction form
    15,487.42/21,371.10 = 8,771.71/x
  3. Step 3: Cross multiply
    15,487.42x = 21,371.10 × 8,771.71
  4. Step 4: Simplify right side
    15,487.42x = 187,461,091.58
  5. Step 5: Solve for x
    x = 187,461,091.58/15,487.42
  6. Step 6: Final answer
    x = 12,104.09

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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.