Home / 13,639.76-20,459.64-4,406.48

Finding the Fourth Proportional to 13,639.76, 20,459.64 and 4,406.48

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Solution

The fourth proportional to 13,639.76, 20,459.64 and 4,406.48 is: 6,609.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.76 : 20,459.64 = 4,406.48 : x
  2. Step 2: Convert to fraction form
    13,639.76/20,459.64 = 4,406.48/x
  3. Step 3: Cross multiply
    13,639.76x = 20,459.64 × 4,406.48
  4. Step 4: Simplify right side
    13,639.76x = 90,154,994.47
  5. Step 5: Solve for x
    x = 90,154,994.47/13,639.76
  6. Step 6: Final answer
    x = 6,609.72

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Similar ratio
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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.