Home / 21,168.81-31,854.87-17,447.40

Finding the Fourth Proportional to 21,168.81, 31,854.87 and 17,447.40

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Solution

The fourth proportional to 21,168.81, 31,854.87 and 17,447.40 is: 26,254.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,168.81 : 31,854.87 = 17,447.40 : x
  2. Step 2: Convert to fraction form
    21,168.81/31,854.87 = 17,447.40/x
  3. Step 3: Cross multiply
    21,168.81x = 31,854.87 × 17,447.40
  4. Step 4: Simplify right side
    21,168.81x = 555,784,658.84
  5. Step 5: Solve for x
    x = 555,784,658.84/21,168.81
  6. Step 6: Final answer
    x = 26,254.88

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1.5x scale

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.