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Finding the Fourth Proportional to 42,436.99, 63,558.60 and 20,265.99

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Solution

The fourth proportional to 42,436.99, 63,558.60 and 20,265.99 is: 30,352.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,436.99 : 63,558.60 = 20,265.99 : x
  2. Step 2: Convert to fraction form
    42,436.99/63,558.60 = 20,265.99/x
  3. Step 3: Cross multiply
    42,436.99x = 63,558.60 × 20,265.99
  4. Step 4: Simplify right side
    42,436.99x = 1,288,077,952.01
  5. Step 5: Solve for x
    x = 1,288,077,952.01/42,436.99
  6. Step 6: Final answer
    x = 30,352.72

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1.5x scale

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.