Home / 20,912.40-31,368.78-5,330.01

Finding the Fourth Proportional to 20,912.40, 31,368.78 and 5,330.01

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Solution

The fourth proportional to 20,912.40, 31,368.78 and 5,330.01 is: 7,995.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.40 : 31,368.78 = 5,330.01 : x
  2. Step 2: Convert to fraction form
    20,912.40/31,368.78 = 5,330.01/x
  3. Step 3: Cross multiply
    20,912.40x = 31,368.78 × 5,330.01
  4. Step 4: Simplify right side
    20,912.40x = 167,195,911.09
  5. Step 5: Solve for x
    x = 167,195,911.09/20,912.40
  6. Step 6: Final answer
    x = 7,995.06

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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.