Home / 21,218.13-29,264.13-13,665.09

Finding the Fourth Proportional to 21,218.13, 29,264.13 and 13,665.09

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Solution

The fourth proportional to 21,218.13, 29,264.13 and 13,665.09 is: 18,846.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.13 : 29,264.13 = 13,665.09 : x
  2. Step 2: Convert to fraction form
    21,218.13/29,264.13 = 13,665.09/x
  3. Step 3: Cross multiply
    21,218.13x = 29,264.13 × 13,665.09
  4. Step 4: Simplify right side
    21,218.13x = 399,896,970.22
  5. Step 5: Solve for x
    x = 399,896,970.22/21,218.13
  6. Step 6: Final answer
    x = 18,846.95

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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.