Home / 20,939.56-28,884.48-12,551.20

Finding the Fourth Proportional to 20,939.56, 28,884.48 and 12,551.20

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Solution

The fourth proportional to 20,939.56, 28,884.48 and 12,551.20 is: 17,313.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.56 : 28,884.48 = 12,551.20 : x
  2. Step 2: Convert to fraction form
    20,939.56/28,884.48 = 12,551.20/x
  3. Step 3: Cross multiply
    20,939.56x = 28,884.48 × 12,551.20
  4. Step 4: Simplify right side
    20,939.56x = 362,534,885.38
  5. Step 5: Solve for x
    x = 362,534,885.38/20,939.56
  6. Step 6: Final answer
    x = 17,313.40

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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.