Home / 21,243.39-29,311.50-12,287.64

Finding the Fourth Proportional to 21,243.39, 29,311.50 and 12,287.64

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Solution

The fourth proportional to 21,243.39, 29,311.50 and 12,287.64 is: 16,954.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,243.39 : 29,311.50 = 12,287.64 : x
  2. Step 2: Convert to fraction form
    21,243.39/29,311.50 = 12,287.64/x
  3. Step 3: Cross multiply
    21,243.39x = 29,311.50 × 12,287.64
  4. Step 4: Simplify right side
    21,243.39x = 360,169,159.86
  5. Step 5: Solve for x
    x = 360,169,159.86/21,243.39
  6. Step 6: Final answer
    x = 16,954.41

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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.