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Finding the Fourth Proportional to 13,320, 19,980 and 5,001.93

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Solution

The fourth proportional to 13,320, 19,980 and 5,001.93 is: 7,502.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,320 : 19,980 = 5,001.93 : x
  2. Step 2: Convert to fraction form
    13,320/19,980 = 5,001.93/x
  3. Step 3: Cross multiply
    13,320x = 19,980 × 5,001.93
  4. Step 4: Simplify right side
    13,320x = 99,938,561.40
  5. Step 5: Solve for x
    x = 99,938,561.40/13,320
  6. Step 6: Final answer
    x = 7,502.90

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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.