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Finding the Fourth Proportional to 13,230.65, 19,840.98 and 5,330.49

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Solution

The fourth proportional to 13,230.65, 19,840.98 and 5,330.49 is: 7,993.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,230.65 : 19,840.98 = 5,330.49 : x
  2. Step 2: Convert to fraction form
    13,230.65/19,840.98 = 5,330.49/x
  3. Step 3: Cross multiply
    13,230.65x = 19,840.98 × 5,330.49
  4. Step 4: Simplify right side
    13,230.65x = 105,762,145.48
  5. Step 5: Solve for x
    x = 105,762,145.48/13,230.65
  6. Step 6: Final answer
    x = 7,993.72

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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.