Home / 55,503.28-83,215.92-20,438.40

Finding the Fourth Proportional to 55,503.28, 83,215.92 and 20,438.40

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Solution

The fourth proportional to 55,503.28, 83,215.92 and 20,438.40 is: 30,643.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,503.28 : 83,215.92 = 20,438.40 : x
  2. Step 2: Convert to fraction form
    55,503.28/83,215.92 = 20,438.40/x
  3. Step 3: Cross multiply
    55,503.28x = 83,215.92 × 20,438.40
  4. Step 4: Simplify right side
    55,503.28x = 1,700,800,259.33
  5. Step 5: Solve for x
    x = 1,700,800,259.33/55,503.28
  6. Step 6: Final answer
    x = 30,643.24

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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.