Home / 8,918.28-13,349.36-6,128.64

Finding the Fourth Proportional to 8,918.28, 13,349.36 and 6,128.64

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Solution

The fourth proportional to 8,918.28, 13,349.36 and 6,128.64 is: 9,173.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.28 : 13,349.36 = 6,128.64 : x
  2. Step 2: Convert to fraction form
    8,918.28/13,349.36 = 6,128.64/x
  3. Step 3: Cross multiply
    8,918.28x = 13,349.36 × 6,128.64
  4. Step 4: Simplify right side
    8,918.28x = 81,813,421.67
  5. Step 5: Solve for x
    x = 81,813,421.67/8,918.28
  6. Step 6: Final answer
    x = 9,173.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.