Home / 42,811.17-64,189.41-20,580.31

Finding the Fourth Proportional to 42,811.17, 64,189.41 and 20,580.31

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Solution

The fourth proportional to 42,811.17, 64,189.41 and 20,580.31 is: 30,857.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,811.17 : 64,189.41 = 20,580.31 : x
  2. Step 2: Convert to fraction form
    42,811.17/64,189.41 = 20,580.31/x
  3. Step 3: Cross multiply
    42,811.17x = 64,189.41 × 20,580.31
  4. Step 4: Simplify right side
    42,811.17x = 1,321,037,956.52
  5. Step 5: Solve for x
    x = 1,321,037,956.52/42,811.17
  6. Step 6: Final answer
    x = 30,857.32

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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.