Home / 21,424.08-29,561.10-13,869.36

Finding the Fourth Proportional to 21,424.08, 29,561.10 and 13,869.36

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Solution

The fourth proportional to 21,424.08, 29,561.10 and 13,869.36 is: 19,137.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,424.08 : 29,561.10 = 13,869.36 : x
  2. Step 2: Convert to fraction form
    21,424.08/29,561.10 = 13,869.36/x
  3. Step 3: Cross multiply
    21,424.08x = 29,561.10 × 13,869.36
  4. Step 4: Simplify right side
    21,424.08x = 409,993,537.90
  5. Step 5: Solve for x
    x = 409,993,537.90/21,424.08
  6. Step 6: Final answer
    x = 19,137.04

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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.