Home / 21,216-29,278.08-11,785.44

Finding the Fourth Proportional to 21,216, 29,278.08 and 11,785.44

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Solution

The fourth proportional to 21,216, 29,278.08 and 11,785.44 is: 16,263.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,216 : 29,278.08 = 11,785.44 : x
  2. Step 2: Convert to fraction form
    21,216/29,278.08 = 11,785.44/x
  3. Step 3: Cross multiply
    21,216x = 29,278.08 × 11,785.44
  4. Step 4: Simplify right side
    21,216x = 345,055,055.16
  5. Step 5: Solve for x
    x = 345,055,055.16/21,216
  6. Step 6: Final answer
    x = 16,263.91

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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.