Home / 13,291.35-19,937.06-12,479.43

Finding the Fourth Proportional to 13,291.35, 19,937.06 and 12,479.43

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Solution

The fourth proportional to 13,291.35, 19,937.06 and 12,479.43 is: 18,719.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,291.35 : 19,937.06 = 12,479.43 : x
  2. Step 2: Convert to fraction form
    13,291.35/19,937.06 = 12,479.43/x
  3. Step 3: Cross multiply
    13,291.35x = 19,937.06 × 12,479.43
  4. Step 4: Simplify right side
    13,291.35x = 248,803,082.28
  5. Step 5: Solve for x
    x = 248,803,082.28/13,291.35
  6. Step 6: Final answer
    x = 18,719.17

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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.