Home / 21,271.59-31,901.45-8,787.87

Finding the Fourth Proportional to 21,271.59, 31,901.45 and 8,787.87

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Solution

The fourth proportional to 21,271.59, 31,901.45 and 8,787.87 is: 13,179.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,271.59 : 31,901.45 = 8,787.87 : x
  2. Step 2: Convert to fraction form
    21,271.59/31,901.45 = 8,787.87/x
  3. Step 3: Cross multiply
    21,271.59x = 31,901.45 × 8,787.87
  4. Step 4: Simplify right side
    21,271.59x = 280,345,751.47
  5. Step 5: Solve for x
    x = 280,345,751.47/21,271.59
  6. Step 6: Final answer
    x = 13,179.35

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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.