Home / 21,185.16-29,223.36-13,213.55

Finding the Fourth Proportional to 21,185.16, 29,223.36 and 13,213.55

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Solution

The fourth proportional to 21,185.16, 29,223.36 and 13,213.55 is: 18,227.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,185.16 : 29,223.36 = 13,213.55 : x
  2. Step 2: Convert to fraction form
    21,185.16/29,223.36 = 13,213.55/x
  3. Step 3: Cross multiply
    21,185.16x = 29,223.36 × 13,213.55
  4. Step 4: Simplify right side
    21,185.16x = 386,144,182.41
  5. Step 5: Solve for x
    x = 386,144,182.41/21,185.16
  6. Step 6: Final answer
    x = 18,227.11

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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.