Home / 20,681.06-31,018.65-6,642.30

Finding the Fourth Proportional to 20,681.06, 31,018.65 and 6,642.30

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Solution

The fourth proportional to 20,681.06, 31,018.65 and 6,642.30 is: 9,962.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,681.06 : 31,018.65 = 6,642.30 : x
  2. Step 2: Convert to fraction form
    20,681.06/31,018.65 = 6,642.30/x
  3. Step 3: Cross multiply
    20,681.06x = 31,018.65 × 6,642.30
  4. Step 4: Simplify right side
    20,681.06x = 206,035,178.90
  5. Step 5: Solve for x
    x = 206,035,178.90/20,681.06
  6. Step 6: Final answer
    x = 9,962.51

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.