Home / 21,274.79-29,353.31-13,721.45

Finding the Fourth Proportional to 21,274.79, 29,353.31 and 13,721.45

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Solution

The fourth proportional to 21,274.79, 29,353.31 and 13,721.45 is: 18,931.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,274.79 : 29,353.31 = 13,721.45 : x
  2. Step 2: Convert to fraction form
    21,274.79/29,353.31 = 13,721.45/x
  3. Step 3: Cross multiply
    21,274.79x = 29,353.31 × 13,721.45
  4. Step 4: Simplify right side
    21,274.79x = 402,769,760.13
  5. Step 5: Solve for x
    x = 402,769,760.13/21,274.79
  6. Step 6: Final answer
    x = 18,931.78

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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.