Home / 20,948.51-31,424.81-6,902.79

Finding the Fourth Proportional to 20,948.51, 31,424.81 and 6,902.79

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Solution

The fourth proportional to 20,948.51, 31,424.81 and 6,902.79 is: 10,354.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,948.51 : 31,424.81 = 6,902.79 : x
  2. Step 2: Convert to fraction form
    20,948.51/31,424.81 = 6,902.79/x
  3. Step 3: Cross multiply
    20,948.51x = 31,424.81 × 6,902.79
  4. Step 4: Simplify right side
    20,948.51x = 216,918,829.71
  5. Step 5: Solve for x
    x = 216,918,829.71/20,948.51
  6. Step 6: Final answer
    x = 10,354.86

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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.