Home / 21,177.36-29,230.47-13,214.79

Finding the Fourth Proportional to 21,177.36, 29,230.47 and 13,214.79

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Solution

The fourth proportional to 21,177.36, 29,230.47 and 13,214.79 is: 18,239.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,177.36 : 29,230.47 = 13,214.79 : x
  2. Step 2: Convert to fraction form
    21,177.36/29,230.47 = 13,214.79/x
  3. Step 3: Cross multiply
    21,177.36x = 29,230.47 × 13,214.79
  4. Step 4: Simplify right side
    21,177.36x = 386,274,522.65
  5. Step 5: Solve for x
    x = 386,274,522.65/21,177.36
  6. Step 6: Final answer
    x = 18,239.98

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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.