Home / 20,691.21-31,038.63-6,652.50

Finding the Fourth Proportional to 20,691.21, 31,038.63 and 6,652.50

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Solution

The fourth proportional to 20,691.21, 31,038.63 and 6,652.50 is: 9,979.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.21 : 31,038.63 = 6,652.50 : x
  2. Step 2: Convert to fraction form
    20,691.21/31,038.63 = 6,652.50/x
  3. Step 3: Cross multiply
    20,691.21x = 31,038.63 × 6,652.50
  4. Step 4: Simplify right side
    20,691.21x = 206,484,486.08
  5. Step 5: Solve for x
    x = 206,484,486.08/20,691.21
  6. Step 6: Final answer
    x = 9,979.33

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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.