Home / 20,568.86-28,385.55-12,615.47

Finding the Fourth Proportional to 20,568.86, 28,385.55 and 12,615.47

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Solution

The fourth proportional to 20,568.86, 28,385.55 and 12,615.47 is: 17,409.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,568.86 : 28,385.55 = 12,615.47 : x
  2. Step 2: Convert to fraction form
    20,568.86/28,385.55 = 12,615.47/x
  3. Step 3: Cross multiply
    20,568.86x = 28,385.55 × 12,615.47
  4. Step 4: Simplify right side
    20,568.86x = 358,096,912.53
  5. Step 5: Solve for x
    x = 358,096,912.53/20,568.86
  6. Step 6: Final answer
    x = 17,409.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.