Home / 42,471.92-63,710.30-12,890.72

Finding the Fourth Proportional to 42,471.92, 63,710.30 and 12,890.72

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Solution

The fourth proportional to 42,471.92, 63,710.30 and 12,890.72 is: 19,336.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,471.92 : 63,710.30 = 12,890.72 : x
  2. Step 2: Convert to fraction form
    42,471.92/63,710.30 = 12,890.72/x
  3. Step 3: Cross multiply
    42,471.92x = 63,710.30 × 12,890.72
  4. Step 4: Simplify right side
    42,471.92x = 821,271,352.09
  5. Step 5: Solve for x
    x = 821,271,352.09/42,471.92
  6. Step 6: Final answer
    x = 19,336.81

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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.