Home / 20,881.15-31,323.54-5,298.77

Finding the Fourth Proportional to 20,881.15, 31,323.54 and 5,298.77

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Solution

The fourth proportional to 20,881.15, 31,323.54 and 5,298.77 is: 7,948.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.15 : 31,323.54 = 5,298.77 : x
  2. Step 2: Convert to fraction form
    20,881.15/31,323.54 = 5,298.77/x
  3. Step 3: Cross multiply
    20,881.15x = 31,323.54 × 5,298.77
  4. Step 4: Simplify right side
    20,881.15x = 165,976,332.23
  5. Step 5: Solve for x
    x = 165,976,332.23/20,881.15
  6. Step 6: Final answer
    x = 7,948.62

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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.