Home / 19,921.30-29,881.97-5,130.25

Finding the Fourth Proportional to 19,921.30, 29,881.97 and 5,130.25

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Solution

The fourth proportional to 19,921.30, 29,881.97 and 5,130.25 is: 7,695.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,921.30 : 29,881.97 = 5,130.25 : x
  2. Step 2: Convert to fraction form
    19,921.30/29,881.97 = 5,130.25/x
  3. Step 3: Cross multiply
    19,921.30x = 29,881.97 × 5,130.25
  4. Step 4: Simplify right side
    19,921.30x = 153,301,976.59
  5. Step 5: Solve for x
    x = 153,301,976.59/19,921.30
  6. Step 6: Final answer
    x = 7,695.38

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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.