Home / 10,787.80-16,172.10-9,621.40

Finding the Fourth Proportional to 10,787.80, 16,172.10 and 9,621.40

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Solution

The fourth proportional to 10,787.80, 16,172.10 and 9,621.40 is: 14,423.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,787.80 : 16,172.10 = 9,621.40 : x
  2. Step 2: Convert to fraction form
    10,787.80/16,172.10 = 9,621.40/x
  3. Step 3: Cross multiply
    10,787.80x = 16,172.10 × 9,621.40
  4. Step 4: Simplify right side
    10,787.80x = 155,598,242.94
  5. Step 5: Solve for x
    x = 155,598,242.94/10,787.80
  6. Step 6: Final answer
    x = 14,423.54

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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.