Home / 22,378.77-30,882.08-12,307.21

Finding the Fourth Proportional to 22,378.77, 30,882.08 and 12,307.21

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Solution

The fourth proportional to 22,378.77, 30,882.08 and 12,307.21 is: 16,983.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,378.77 : 30,882.08 = 12,307.21 : x
  2. Step 2: Convert to fraction form
    22,378.77/30,882.08 = 12,307.21/x
  3. Step 3: Cross multiply
    22,378.77x = 30,882.08 × 12,307.21
  4. Step 4: Simplify right side
    22,378.77x = 380,072,281.22
  5. Step 5: Solve for x
    x = 380,072,281.22/22,378.77
  6. Step 6: Final answer
    x = 16,983.61

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Double scale
Find fourth proportional to 22,379.77, 30,883.46 and 12,308.21
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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.