Home / 13,281.71-19,920.33-3,921.55

Finding the Fourth Proportional to 13,281.71, 19,920.33 and 3,921.55

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Solution

The fourth proportional to 13,281.71, 19,920.33 and 3,921.55 is: 5,881.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,281.71 : 19,920.33 = 3,921.55 : x
  2. Step 2: Convert to fraction form
    13,281.71/19,920.33 = 3,921.55/x
  3. Step 3: Cross multiply
    13,281.71x = 19,920.33 × 3,921.55
  4. Step 4: Simplify right side
    13,281.71x = 78,118,520.31
  5. Step 5: Solve for x
    x = 78,118,520.31/13,281.71
  6. Step 6: Final answer
    x = 5,881.66

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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.