Home / 20,689.16-31,028.70-5,899.40

Finding the Fourth Proportional to 20,689.16, 31,028.70 and 5,899.40

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Solution

The fourth proportional to 20,689.16, 31,028.70 and 5,899.40 is: 8,847.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.16 : 31,028.70 = 5,899.40 : x
  2. Step 2: Convert to fraction form
    20,689.16/31,028.70 = 5,899.40/x
  3. Step 3: Cross multiply
    20,689.16x = 31,028.70 × 5,899.40
  4. Step 4: Simplify right side
    20,689.16x = 183,050,712.78
  5. Step 5: Solve for x
    x = 183,050,712.78/20,689.16
  6. Step 6: Final answer
    x = 8,847.66

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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.