Home / 10,113.20-13,958.88-7,129.92

Finding the Fourth Proportional to 10,113.20, 13,958.88 and 7,129.92

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Solution

The fourth proportional to 10,113.20, 13,958.88 and 7,129.92 is: 9,841.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,113.20 : 13,958.88 = 7,129.92 : x
  2. Step 2: Convert to fraction form
    10,113.20/13,958.88 = 7,129.92/x
  3. Step 3: Cross multiply
    10,113.20x = 13,958.88 × 7,129.92
  4. Step 4: Simplify right side
    10,113.20x = 99,525,697.69
  5. Step 5: Solve for x
    x = 99,525,697.69/10,113.20
  6. Step 6: Final answer
    x = 9,841.17

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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.