Home / 20,881.18-31,301.79-7,730.02

Finding the Fourth Proportional to 20,881.18, 31,301.79 and 7,730.02

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Solution

The fourth proportional to 20,881.18, 31,301.79 and 7,730.02 is: 11,587.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.18 : 31,301.79 = 7,730.02 : x
  2. Step 2: Convert to fraction form
    20,881.18/31,301.79 = 7,730.02/x
  3. Step 3: Cross multiply
    20,881.18x = 31,301.79 × 7,730.02
  4. Step 4: Simplify right side
    20,881.18x = 241,963,462.74
  5. Step 5: Solve for x
    x = 241,963,462.74/20,881.18
  6. Step 6: Final answer
    x = 11,587.63

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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.