Home / 13,424.88-18,516.08-9,121.30

Finding the Fourth Proportional to 13,424.88, 18,516.08 and 9,121.30

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Solution

The fourth proportional to 13,424.88, 18,516.08 and 9,121.30 is: 12,580.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,424.88 : 18,516.08 = 9,121.30 : x
  2. Step 2: Convert to fraction form
    13,424.88/18,516.08 = 9,121.30/x
  3. Step 3: Cross multiply
    13,424.88x = 18,516.08 × 9,121.30
  4. Step 4: Simplify right side
    13,424.88x = 168,890,720.50
  5. Step 5: Solve for x
    x = 168,890,720.50/13,424.88
  6. Step 6: Final answer
    x = 12,580.43

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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.