Home / 9,919.36-13,688.64-5,729.92

Finding the Fourth Proportional to 9,919.36, 13,688.64 and 5,729.92

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Solution

The fourth proportional to 9,919.36, 13,688.64 and 5,729.92 is: 7,907.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,919.36 : 13,688.64 = 5,729.92 : x
  2. Step 2: Convert to fraction form
    9,919.36/13,688.64 = 5,729.92/x
  3. Step 3: Cross multiply
    9,919.36x = 13,688.64 × 5,729.92
  4. Step 4: Simplify right side
    9,919.36x = 78,434,812.11
  5. Step 5: Solve for x
    x = 78,434,812.11/9,919.36
  6. Step 6: Final answer
    x = 7,907.25

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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.