Home / 21,197.79-29,236.65-15,530.49

Finding the Fourth Proportional to 21,197.79, 29,236.65 and 15,530.49

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Solution

The fourth proportional to 21,197.79, 29,236.65 and 15,530.49 is: 21,420.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,197.79 : 29,236.65 = 15,530.49 : x
  2. Step 2: Convert to fraction form
    21,197.79/29,236.65 = 15,530.49/x
  3. Step 3: Cross multiply
    21,197.79x = 29,236.65 × 15,530.49
  4. Step 4: Simplify right side
    21,197.79x = 454,059,500.46
  5. Step 5: Solve for x
    x = 454,059,500.46/21,197.79
  6. Step 6: Final answer
    x = 21,420.13

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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.