Home / 55,438.21-83,190.11-20,402.47

Finding the Fourth Proportional to 55,438.21, 83,190.11 and 20,402.47

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Solution

The fourth proportional to 55,438.21, 83,190.11 and 20,402.47 is: 30,615.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,438.21 : 83,190.11 = 20,402.47 : x
  2. Step 2: Convert to fraction form
    55,438.21/83,190.11 = 20,402.47/x
  3. Step 3: Cross multiply
    55,438.21x = 83,190.11 × 20,402.47
  4. Step 4: Simplify right side
    55,438.21x = 1,697,283,723.57
  5. Step 5: Solve for x
    x = 1,697,283,723.57/55,438.21
  6. Step 6: Final answer
    x = 30,615.77

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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.