Home / 21,159.36-29,205.63-13,196.79

Finding the Fourth Proportional to 21,159.36, 29,205.63 and 13,196.79

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Solution

The fourth proportional to 21,159.36, 29,205.63 and 13,196.79 is: 18,215.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,159.36 : 29,205.63 = 13,196.79 : x
  2. Step 2: Convert to fraction form
    21,159.36/29,205.63 = 13,196.79/x
  3. Step 3: Cross multiply
    21,159.36x = 29,205.63 × 13,196.79
  4. Step 4: Simplify right side
    21,159.36x = 385,420,565.93
  5. Step 5: Solve for x
    x = 385,420,565.93/21,159.36
  6. Step 6: Final answer
    x = 18,215.13

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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.