Home / 21,135.60-31,705.02-6,343.38

Finding the Fourth Proportional to 21,135.60, 31,705.02 and 6,343.38

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Solution

The fourth proportional to 21,135.60, 31,705.02 and 6,343.38 is: 9,515.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,135.60 : 31,705.02 = 6,343.38 : x
  2. Step 2: Convert to fraction form
    21,135.60/31,705.02 = 6,343.38/x
  3. Step 3: Cross multiply
    21,135.60x = 31,705.02 × 6,343.38
  4. Step 4: Simplify right side
    21,135.60x = 201,116,989.77
  5. Step 5: Solve for x
    x = 201,116,989.77/21,135.60
  6. Step 6: Final answer
    x = 9,515.56

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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.