Home / 42,931.20-64,410.30-20,745.30

Finding the Fourth Proportional to 42,931.20, 64,410.30 and 20,745.30

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Solution

The fourth proportional to 42,931.20, 64,410.30 and 20,745.30 is: 31,124.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,931.20 : 64,410.30 = 20,745.30 : x
  2. Step 2: Convert to fraction form
    42,931.20/64,410.30 = 20,745.30/x
  3. Step 3: Cross multiply
    42,931.20x = 64,410.30 × 20,745.30
  4. Step 4: Simplify right side
    42,931.20x = 1,336,210,996.59
  5. Step 5: Solve for x
    x = 1,336,210,996.59/42,931.20
  6. Step 6: Final answer
    x = 31,124.47

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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.