Home / 13,938.72-20,908.64-6,145.76

Finding the Fourth Proportional to 13,938.72, 20,908.64 and 6,145.76

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Solution

The fourth proportional to 13,938.72, 20,908.64 and 6,145.76 is: 9,218.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,938.72 : 20,908.64 = 6,145.76 : x
  2. Step 2: Convert to fraction form
    13,938.72/20,908.64 = 6,145.76/x
  3. Step 3: Cross multiply
    13,938.72x = 20,908.64 × 6,145.76
  4. Step 4: Simplify right side
    13,938.72x = 128,499,483.37
  5. Step 5: Solve for x
    x = 128,499,483.37/13,938.72
  6. Step 6: Final answer
    x = 9,218.89

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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.