Home / 19,917.71-29,878.10-5,126.76

Finding the Fourth Proportional to 19,917.71, 29,878.10 and 5,126.76

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Solution

The fourth proportional to 19,917.71, 29,878.10 and 5,126.76 is: 7,690.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,917.71 : 29,878.10 = 5,126.76 : x
  2. Step 2: Convert to fraction form
    19,917.71/29,878.10 = 5,126.76/x
  3. Step 3: Cross multiply
    19,917.71x = 29,878.10 × 5,126.76
  4. Step 4: Simplify right side
    19,917.71x = 153,177,822.32
  5. Step 5: Solve for x
    x = 153,177,822.32/19,917.71
  6. Step 6: Final answer
    x = 7,690.54

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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.