Home / 20,419.29-30,615.84-8,580.74

Finding the Fourth Proportional to 20,419.29, 30,615.84 and 8,580.74

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Solution

The fourth proportional to 20,419.29, 30,615.84 and 8,580.74 is: 12,865.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.29 : 30,615.84 = 8,580.74 : x
  2. Step 2: Convert to fraction form
    20,419.29/30,615.84 = 8,580.74/x
  3. Step 3: Cross multiply
    20,419.29x = 30,615.84 × 8,580.74
  4. Step 4: Simplify right side
    20,419.29x = 262,706,409.84
  5. Step 5: Solve for x
    x = 262,706,409.84/20,419.29
  6. Step 6: Final answer
    x = 12,865.60

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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.