Home / 10,420.11-15,628.95-4,179.87

Finding the Fourth Proportional to 10,420.11, 15,628.95 and 4,179.87

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Solution

The fourth proportional to 10,420.11, 15,628.95 and 4,179.87 is: 6,269.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,420.11 : 15,628.95 = 4,179.87 : x
  2. Step 2: Convert to fraction form
    10,420.11/15,628.95 = 4,179.87/x
  3. Step 3: Cross multiply
    10,420.11x = 15,628.95 × 4,179.87
  4. Step 4: Simplify right side
    10,420.11x = 65,326,979.24
  5. Step 5: Solve for x
    x = 65,326,979.24/10,420.11
  6. Step 6: Final answer
    x = 6,269.32

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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.