Home / 13,647.28-20,475.76-7,808.80

Finding the Fourth Proportional to 13,647.28, 20,475.76 and 7,808.80

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Solution

The fourth proportional to 13,647.28, 20,475.76 and 7,808.80 is: 11,715.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,647.28 : 20,475.76 = 7,808.80 : x
  2. Step 2: Convert to fraction form
    13,647.28/20,475.76 = 7,808.80/x
  3. Step 3: Cross multiply
    13,647.28x = 20,475.76 × 7,808.80
  4. Step 4: Simplify right side
    13,647.28x = 159,891,114.69
  5. Step 5: Solve for x
    x = 159,891,114.69/13,647.28
  6. Step 6: Final answer
    x = 11,715.97

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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.