Home / 12,389.78-18,590.16-5,008.66

Finding the Fourth Proportional to 12,389.78, 18,590.16 and 5,008.66

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Solution

The fourth proportional to 12,389.78, 18,590.16 and 5,008.66 is: 7,515.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,389.78 : 18,590.16 = 5,008.66 : x
  2. Step 2: Convert to fraction form
    12,389.78/18,590.16 = 5,008.66/x
  3. Step 3: Cross multiply
    12,389.78x = 18,590.16 × 5,008.66
  4. Step 4: Simplify right side
    12,389.78x = 93,111,790.79
  5. Step 5: Solve for x
    x = 93,111,790.79/12,389.78
  6. Step 6: Final answer
    x = 7,515.21

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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.