Home / 13,200.16-19,813.20-9,921.28

Finding the Fourth Proportional to 13,200.16, 19,813.20 and 9,921.28

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Solution

The fourth proportional to 13,200.16, 19,813.20 and 9,921.28 is: 14,891.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,200.16 : 19,813.20 = 9,921.28 : x
  2. Step 2: Convert to fraction form
    13,200.16/19,813.20 = 9,921.28/x
  3. Step 3: Cross multiply
    13,200.16x = 19,813.20 × 9,921.28
  4. Step 4: Simplify right side
    13,200.16x = 196,572,304.90
  5. Step 5: Solve for x
    x = 196,572,304.90/13,200.16
  6. Step 6: Final answer
    x = 14,891.66

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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.