Home / 20,690.39-31,030.10-5,693.95

Finding the Fourth Proportional to 20,690.39, 31,030.10 and 5,693.95

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Solution

The fourth proportional to 20,690.39, 31,030.10 and 5,693.95 is: 8,539.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.39 : 31,030.10 = 5,693.95 : x
  2. Step 2: Convert to fraction form
    20,690.39/31,030.10 = 5,693.95/x
  3. Step 3: Cross multiply
    20,690.39x = 31,030.10 × 5,693.95
  4. Step 4: Simplify right side
    20,690.39x = 176,683,837.90
  5. Step 5: Solve for x
    x = 176,683,837.90/20,690.39
  6. Step 6: Final answer
    x = 8,539.42

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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.