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Finding the Fourth Proportional to 42,489.77, 63,734.63 and 20,235.67

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Solution

The fourth proportional to 42,489.77, 63,734.63 and 20,235.67 is: 30,353.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,489.77 : 63,734.63 = 20,235.67 : x
  2. Step 2: Convert to fraction form
    42,489.77/63,734.63 = 20,235.67/x
  3. Step 3: Cross multiply
    42,489.77x = 63,734.63 × 20,235.67
  4. Step 4: Simplify right side
    42,489.77x = 1,289,712,679.74
  5. Step 5: Solve for x
    x = 1,289,712,679.74/42,489.77
  6. Step 6: Final answer
    x = 30,353.49

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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.