Home / 10,664.63-15,990.10-4,428.95

Finding the Fourth Proportional to 10,664.63, 15,990.10 and 4,428.95

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Solution

The fourth proportional to 10,664.63, 15,990.10 and 4,428.95 is: 6,640.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,664.63 : 15,990.10 = 4,428.95 : x
  2. Step 2: Convert to fraction form
    10,664.63/15,990.10 = 4,428.95/x
  3. Step 3: Cross multiply
    10,664.63x = 15,990.10 × 4,428.95
  4. Step 4: Simplify right side
    10,664.63x = 70,819,251.30
  5. Step 5: Solve for x
    x = 70,819,251.30/10,664.63
  6. Step 6: Final answer
    x = 6,640.58

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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.