Home / 21,985.38-32,977.78-5,345.36

Finding the Fourth Proportional to 21,985.38, 32,977.78 and 5,345.36

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Solution

The fourth proportional to 21,985.38, 32,977.78 and 5,345.36 is: 8,017.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,985.38 : 32,977.78 = 5,345.36 : x
  2. Step 2: Convert to fraction form
    21,985.38/32,977.78 = 5,345.36/x
  3. Step 3: Cross multiply
    21,985.38x = 32,977.78 × 5,345.36
  4. Step 4: Simplify right side
    21,985.38x = 176,278,106.10
  5. Step 5: Solve for x
    x = 176,278,106.10/21,985.38
  6. Step 6: Final answer
    x = 8,017.97

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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.