Home / 20,938.56-28,885.61-12,435.92

Finding the Fourth Proportional to 20,938.56, 28,885.61 and 12,435.92

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Solution

The fourth proportional to 20,938.56, 28,885.61 and 12,435.92 is: 17,155.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.56 : 28,885.61 = 12,435.92 : x
  2. Step 2: Convert to fraction form
    20,938.56/28,885.61 = 12,435.92/x
  3. Step 3: Cross multiply
    20,938.56x = 28,885.61 × 12,435.92
  4. Step 4: Simplify right side
    20,938.56x = 359,219,135.11
  5. Step 5: Solve for x
    x = 359,219,135.11/20,938.56
  6. Step 6: Final answer
    x = 17,155.87

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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.