Home / 21,167.13-31,754.21-7,128.35

Finding the Fourth Proportional to 21,167.13, 31,754.21 and 7,128.35

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Solution

The fourth proportional to 21,167.13, 31,754.21 and 7,128.35 is: 10,693.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,167.13 : 31,754.21 = 7,128.35 : x
  2. Step 2: Convert to fraction form
    21,167.13/31,754.21 = 7,128.35/x
  3. Step 3: Cross multiply
    21,167.13x = 31,754.21 × 7,128.35
  4. Step 4: Simplify right side
    21,167.13x = 226,354,928.44
  5. Step 5: Solve for x
    x = 226,354,928.44/21,167.13
  6. Step 6: Final answer
    x = 10,693.70

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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.