Home / 19,921.78-29,875.65-5,878.06

Finding the Fourth Proportional to 19,921.78, 29,875.65 and 5,878.06

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Solution

The fourth proportional to 19,921.78, 29,875.65 and 5,878.06 is: 8,815.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,921.78 : 29,875.65 = 5,878.06 : x
  2. Step 2: Convert to fraction form
    19,921.78/29,875.65 = 5,878.06/x
  3. Step 3: Cross multiply
    19,921.78x = 29,875.65 × 5,878.06
  4. Step 4: Simplify right side
    19,921.78x = 175,610,863.24
  5. Step 5: Solve for x
    x = 175,610,863.24/19,921.78
  6. Step 6: Final answer
    x = 8,815.02

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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.