Home / 12,389.42-17,121.98-10,147.75

Finding the Fourth Proportional to 12,389.42, 17,121.98 and 10,147.75

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Solution

The fourth proportional to 12,389.42, 17,121.98 and 10,147.75 is: 14,024.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,389.42 : 17,121.98 = 10,147.75 : x
  2. Step 2: Convert to fraction form
    12,389.42/17,121.98 = 10,147.75/x
  3. Step 3: Cross multiply
    12,389.42x = 17,121.98 × 10,147.75
  4. Step 4: Simplify right side
    12,389.42x = 173,749,555.11
  5. Step 5: Solve for x
    x = 173,749,555.11/12,389.42
  6. Step 6: Final answer
    x = 14,024.02

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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.