Home / 10,128.36-13,989.30-7,798.44

Finding the Fourth Proportional to 10,128.36, 13,989.30 and 7,798.44

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Solution

The fourth proportional to 10,128.36, 13,989.30 and 7,798.44 is: 10,771.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,128.36 : 13,989.30 = 7,798.44 : x
  2. Step 2: Convert to fraction form
    10,128.36/13,989.30 = 7,798.44/x
  3. Step 3: Cross multiply
    10,128.36x = 13,989.30 × 7,798.44
  4. Step 4: Simplify right side
    10,128.36x = 109,094,716.69
  5. Step 5: Solve for x
    x = 109,094,716.69/10,128.36
  6. Step 6: Final answer
    x = 10,771.21

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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.