Home / 42,858.64-64,329.52-20,687.61

Finding the Fourth Proportional to 42,858.64, 64,329.52 and 20,687.61

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Solution

The fourth proportional to 42,858.64, 64,329.52 and 20,687.61 is: 31,051.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,858.64 : 64,329.52 = 20,687.61 : x
  2. Step 2: Convert to fraction form
    42,858.64/64,329.52 = 20,687.61/x
  3. Step 3: Cross multiply
    42,858.64x = 64,329.52 × 20,687.61
  4. Step 4: Simplify right side
    42,858.64x = 1,330,824,021.25
  5. Step 5: Solve for x
    x = 1,330,824,021.25/42,858.64
  6. Step 6: Final answer
    x = 31,051.48

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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.