Home / 15,379.10-21,222.68-8,664.20

Finding the Fourth Proportional to 15,379.10, 21,222.68 and 8,664.20

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Solution

The fourth proportional to 15,379.10, 21,222.68 and 8,664.20 is: 11,956.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,379.10 : 21,222.68 = 8,664.20 : x
  2. Step 2: Convert to fraction form
    15,379.10/21,222.68 = 8,664.20/x
  3. Step 3: Cross multiply
    15,379.10x = 21,222.68 × 8,664.20
  4. Step 4: Simplify right side
    15,379.10x = 183,877,394.62
  5. Step 5: Solve for x
    x = 183,877,394.62/15,379.10
  6. Step 6: Final answer
    x = 11,956.32

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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.