Home / 19,929.61-29,896.14-5,138.40

Finding the Fourth Proportional to 19,929.61, 29,896.14 and 5,138.40

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Solution

The fourth proportional to 19,929.61, 29,896.14 and 5,138.40 is: 7,708.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,929.61 : 29,896.14 = 5,138.40 : x
  2. Step 2: Convert to fraction form
    19,929.61/29,896.14 = 5,138.40/x
  3. Step 3: Cross multiply
    19,929.61x = 29,896.14 × 5,138.40
  4. Step 4: Simplify right side
    19,929.61x = 153,618,300.08
  5. Step 5: Solve for x
    x = 153,618,300.08/19,929.61
  6. Step 6: Final answer
    x = 7,708.04

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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.