Home / 10,137.45-13,989.68-5,661.20

Finding the Fourth Proportional to 10,137.45, 13,989.68 and 5,661.20

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Solution

The fourth proportional to 10,137.45, 13,989.68 and 5,661.20 is: 7,812.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,137.45 : 13,989.68 = 5,661.20 : x
  2. Step 2: Convert to fraction form
    10,137.45/13,989.68 = 5,661.20/x
  3. Step 3: Cross multiply
    10,137.45x = 13,989.68 × 5,661.20
  4. Step 4: Simplify right side
    10,137.45x = 79,198,278.16
  5. Step 5: Solve for x
    x = 79,198,278.16/10,137.45
  6. Step 6: Final answer
    x = 7,812.45

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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.