Home / 21,210.12-29,283.12-13,669.44

Finding the Fourth Proportional to 21,210.12, 29,283.12 and 13,669.44

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Solution

The fourth proportional to 21,210.12, 29,283.12 and 13,669.44 is: 18,872.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,210.12 : 29,283.12 = 13,669.44 : x
  2. Step 2: Convert to fraction form
    21,210.12/29,283.12 = 13,669.44/x
  3. Step 3: Cross multiply
    21,210.12x = 29,283.12 × 13,669.44
  4. Step 4: Simplify right side
    21,210.12x = 400,283,851.85
  5. Step 5: Solve for x
    x = 400,283,851.85/21,210.12
  6. Step 6: Final answer
    x = 18,872.30

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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.