Home / 15,310.65-21,128.67-8,936.76

Finding the Fourth Proportional to 15,310.65, 21,128.67 and 8,936.76

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Solution

The fourth proportional to 15,310.65, 21,128.67 and 8,936.76 is: 12,332.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,310.65 : 21,128.67 = 8,936.76 : x
  2. Step 2: Convert to fraction form
    15,310.65/21,128.67 = 8,936.76/x
  3. Step 3: Cross multiply
    15,310.65x = 21,128.67 × 8,936.76
  4. Step 4: Simplify right side
    15,310.65x = 188,821,852.91
  5. Step 5: Solve for x
    x = 188,821,852.91/15,310.65
  6. Step 6: Final answer
    x = 12,332.71

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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.