Home / 14,427.20-21,640.80-5,657.60

Finding the Fourth Proportional to 14,427.20, 21,640.80 and 5,657.60

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Solution

The fourth proportional to 14,427.20, 21,640.80 and 5,657.60 is: 8,486.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,427.20 : 21,640.80 = 5,657.60 : x
  2. Step 2: Convert to fraction form
    14,427.20/21,640.80 = 5,657.60/x
  3. Step 3: Cross multiply
    14,427.20x = 21,640.80 × 5,657.60
  4. Step 4: Simplify right side
    14,427.20x = 122,434,990.08
  5. Step 5: Solve for x
    x = 122,434,990.08/14,427.20
  6. Step 6: Final answer
    x = 8,486.40

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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.