Home / 21,108.50-29,133.64-13,564.26

Finding the Fourth Proportional to 21,108.50, 29,133.64 and 13,564.26

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Solution

The fourth proportional to 21,108.50, 29,133.64 and 13,564.26 is: 18,721.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,108.50 : 29,133.64 = 13,564.26 : x
  2. Step 2: Convert to fraction form
    21,108.50/29,133.64 = 13,564.26/x
  3. Step 3: Cross multiply
    21,108.50x = 29,133.64 × 13,564.26
  4. Step 4: Simplify right side
    21,108.50x = 395,176,284.66
  5. Step 5: Solve for x
    x = 395,176,284.66/21,108.50
  6. Step 6: Final answer
    x = 18,721.19

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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.