Home / 13,678.28-18,877.44-8,376.60

Finding the Fourth Proportional to 13,678.28, 18,877.44 and 8,376.60

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Solution

The fourth proportional to 13,678.28, 18,877.44 and 8,376.60 is: 11,560.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,678.28 : 18,877.44 = 8,376.60 : x
  2. Step 2: Convert to fraction form
    13,678.28/18,877.44 = 8,376.60/x
  3. Step 3: Cross multiply
    13,678.28x = 18,877.44 × 8,376.60
  4. Step 4: Simplify right side
    13,678.28x = 158,128,763.90
  5. Step 5: Solve for x
    x = 158,128,763.90/13,678.28
  6. Step 6: Final answer
    x = 11,560.57

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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.