Home / 21,176.10-29,216.70-13,215.42

Finding the Fourth Proportional to 21,176.10, 29,216.70 and 13,215.42

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Solution

The fourth proportional to 21,176.10, 29,216.70 and 13,215.42 is: 18,233.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,176.10 : 29,216.70 = 13,215.42 : x
  2. Step 2: Convert to fraction form
    21,176.10/29,216.70 = 13,215.42/x
  3. Step 3: Cross multiply
    21,176.10x = 29,216.70 × 13,215.42
  4. Step 4: Simplify right side
    21,176.10x = 386,110,961.51
  5. Step 5: Solve for x
    x = 386,110,961.51/21,176.10
  6. Step 6: Final answer
    x = 18,233.34

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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.