Home / 12,918.40-19,363.20-5,521.60

Finding the Fourth Proportional to 12,918.40, 19,363.20 and 5,521.60

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Solution

The fourth proportional to 12,918.40, 19,363.20 and 5,521.60 is: 8,276.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,918.40 : 19,363.20 = 5,521.60 : x
  2. Step 2: Convert to fraction form
    12,918.40/19,363.20 = 5,521.60/x
  3. Step 3: Cross multiply
    12,918.40x = 19,363.20 × 5,521.60
  4. Step 4: Simplify right side
    12,918.40x = 106,915,845.12
  5. Step 5: Solve for x
    x = 106,915,845.12/12,918.40
  6. Step 6: Final answer
    x = 8,276.25

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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.