Home / 21,311.77-29,410.28-11,880.13

Finding the Fourth Proportional to 21,311.77, 29,410.28 and 11,880.13

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Solution

The fourth proportional to 21,311.77, 29,410.28 and 11,880.13 is: 16,394.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,311.77 : 29,410.28 = 11,880.13 : x
  2. Step 2: Convert to fraction form
    21,311.77/29,410.28 = 11,880.13/x
  3. Step 3: Cross multiply
    21,311.77x = 29,410.28 × 11,880.13
  4. Step 4: Simplify right side
    21,311.77x = 349,397,949.74
  5. Step 5: Solve for x
    x = 349,397,949.74/21,311.77
  6. Step 6: Final answer
    x = 16,394.60

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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.