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Finding the Fourth Proportional to 13,299.20, 19,948.80 and 4,065.20

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Solution

The fourth proportional to 13,299.20, 19,948.80 and 4,065.20 is: 6,097.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,299.20 : 19,948.80 = 4,065.20 : x
  2. Step 2: Convert to fraction form
    13,299.20/19,948.80 = 4,065.20/x
  3. Step 3: Cross multiply
    13,299.20x = 19,948.80 × 4,065.20
  4. Step 4: Simplify right side
    13,299.20x = 81,095,762.02
  5. Step 5: Solve for x
    x = 81,095,762.02/13,299.20
  6. Step 6: Final answer
    x = 6,097.79

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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.