Home / 21,518.16-29,695.80-12,086.52

Finding the Fourth Proportional to 21,518.16, 29,695.80 and 12,086.52

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Solution

The fourth proportional to 21,518.16, 29,695.80 and 12,086.52 is: 16,679.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,518.16 : 29,695.80 = 12,086.52 : x
  2. Step 2: Convert to fraction form
    21,518.16/29,695.80 = 12,086.52/x
  3. Step 3: Cross multiply
    21,518.16x = 29,695.80 × 12,086.52
  4. Step 4: Simplify right side
    21,518.16x = 358,918,880.62
  5. Step 5: Solve for x
    x = 358,918,880.62/21,518.16
  6. Step 6: Final answer
    x = 16,679.81

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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.