Home / 14,185.76-21,278.60-5,421.56

Finding the Fourth Proportional to 14,185.76, 21,278.60 and 5,421.56

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Solution

The fourth proportional to 14,185.76, 21,278.60 and 5,421.56 is: 8,132.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,185.76 : 21,278.60 = 5,421.56 : x
  2. Step 2: Convert to fraction form
    14,185.76/21,278.60 = 5,421.56/x
  3. Step 3: Cross multiply
    14,185.76x = 21,278.60 × 5,421.56
  4. Step 4: Simplify right side
    14,185.76x = 115,363,206.62
  5. Step 5: Solve for x
    x = 115,363,206.62/14,185.76
  6. Step 6: Final answer
    x = 8,132.32

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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.