Home / 20,796.79-28,700.73-13,718.20

Finding the Fourth Proportional to 20,796.79, 28,700.73 and 13,718.20

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Solution

The fourth proportional to 20,796.79, 28,700.73 and 13,718.20 is: 18,931.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,796.79 : 28,700.73 = 13,718.20 : x
  2. Step 2: Convert to fraction form
    20,796.79/28,700.73 = 13,718.20/x
  3. Step 3: Cross multiply
    20,796.79x = 28,700.73 × 13,718.20
  4. Step 4: Simplify right side
    20,796.79x = 393,722,142.19
  5. Step 5: Solve for x
    x = 393,722,142.19/20,796.79
  6. Step 6: Final answer
    x = 18,931.88

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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.