Home / 15,347.45-21,179.13-9,379.10

Finding the Fourth Proportional to 15,347.45, 21,179.13 and 9,379.10

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Solution

The fourth proportional to 15,347.45, 21,179.13 and 9,379.10 is: 12,942.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,347.45 : 21,179.13 = 9,379.10 : x
  2. Step 2: Convert to fraction form
    15,347.45/21,179.13 = 9,379.10/x
  3. Step 3: Cross multiply
    15,347.45x = 21,179.13 × 9,379.10
  4. Step 4: Simplify right side
    15,347.45x = 198,641,178.18
  5. Step 5: Solve for x
    x = 198,641,178.18/15,347.45
  6. Step 6: Final answer
    x = 12,942.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.