Home / 20,902.51-31,364.52-13,887.35

Finding the Fourth Proportional to 20,902.51, 31,364.52 and 13,887.35

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Solution

The fourth proportional to 20,902.51, 31,364.52 and 13,887.35 is: 20,838.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,902.51 : 31,364.52 = 13,887.35 : x
  2. Step 2: Convert to fraction form
    20,902.51/31,364.52 = 13,887.35/x
  3. Step 3: Cross multiply
    20,902.51x = 31,364.52 × 13,887.35
  4. Step 4: Simplify right side
    20,902.51x = 435,569,975.54
  5. Step 5: Solve for x
    x = 435,569,975.54/20,902.51
  6. Step 6: Final answer
    x = 20,838.17

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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.