Home / 19,920.40-29,871.07-11,602.79

Finding the Fourth Proportional to 19,920.40, 29,871.07 and 11,602.79

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Solution

The fourth proportional to 19,920.40, 29,871.07 and 11,602.79 is: 17,398.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,920.40 : 29,871.07 = 11,602.79 : x
  2. Step 2: Convert to fraction form
    19,920.40/29,871.07 = 11,602.79/x
  3. Step 3: Cross multiply
    19,920.40x = 29,871.07 × 11,602.79
  4. Step 4: Simplify right side
    19,920.40x = 346,587,748.12
  5. Step 5: Solve for x
    x = 346,587,748.12/19,920.40
  6. Step 6: Final answer
    x = 17,398.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.