Home / 13,220.29-19,838.63-5,429.10

Finding the Fourth Proportional to 13,220.29, 19,838.63 and 5,429.10

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Solution

The fourth proportional to 13,220.29, 19,838.63 and 5,429.10 is: 8,147.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,220.29 : 19,838.63 = 5,429.10 : x
  2. Step 2: Convert to fraction form
    13,220.29/19,838.63 = 5,429.10/x
  3. Step 3: Cross multiply
    13,220.29x = 19,838.63 × 5,429.10
  4. Step 4: Simplify right side
    13,220.29x = 107,705,906.13
  5. Step 5: Solve for x
    x = 107,705,906.13/13,220.29
  6. Step 6: Final answer
    x = 8,147.02

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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.