Home / 20,837.64-31,230-15,005.64

Finding the Fourth Proportional to 20,837.64, 31,230 and 15,005.64

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Solution

The fourth proportional to 20,837.64, 31,230 and 15,005.64 is: 22,489.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,837.64 : 31,230 = 15,005.64 : x
  2. Step 2: Convert to fraction form
    20,837.64/31,230 = 15,005.64/x
  3. Step 3: Cross multiply
    20,837.64x = 31,230 × 15,005.64
  4. Step 4: Simplify right side
    20,837.64x = 468,626,137.20
  5. Step 5: Solve for x
    x = 468,626,137.20/20,837.64
  6. Step 6: Final answer
    x = 22,489.41

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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.