Home / 12,518.57-18,776.91-5,121.02

Finding the Fourth Proportional to 12,518.57, 18,776.91 and 5,121.02

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Solution

The fourth proportional to 12,518.57, 18,776.91 and 5,121.02 is: 7,681.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,518.57 : 18,776.91 = 5,121.02 : x
  2. Step 2: Convert to fraction form
    12,518.57/18,776.91 = 5,121.02/x
  3. Step 3: Cross multiply
    12,518.57x = 18,776.91 × 5,121.02
  4. Step 4: Simplify right side
    12,518.57x = 96,156,931.65
  5. Step 5: Solve for x
    x = 96,156,931.65/12,518.57
  6. Step 6: Final answer
    x = 7,681.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.