Home / 11,300.05-15,600.28-7,720.39

Finding the Fourth Proportional to 11,300.05, 15,600.28 and 7,720.39

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Solution

The fourth proportional to 11,300.05, 15,600.28 and 7,720.39 is: 10,658.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,300.05 : 15,600.28 = 7,720.39 : x
  2. Step 2: Convert to fraction form
    11,300.05/15,600.28 = 7,720.39/x
  3. Step 3: Cross multiply
    11,300.05x = 15,600.28 × 7,720.39
  4. Step 4: Simplify right side
    11,300.05x = 120,440,313.86
  5. Step 5: Solve for x
    x = 120,440,313.86/11,300.05
  6. Step 6: Final answer
    x = 10,658.38

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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.