Home / 21,152.96-29,186.88-12,769.92

Finding the Fourth Proportional to 21,152.96, 29,186.88 and 12,769.92

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Solution

The fourth proportional to 21,152.96, 29,186.88 and 12,769.92 is: 17,619.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,152.96 : 29,186.88 = 12,769.92 : x
  2. Step 2: Convert to fraction form
    21,152.96/29,186.88 = 12,769.92/x
  3. Step 3: Cross multiply
    21,152.96x = 29,186.88 × 12,769.92
  4. Step 4: Simplify right side
    21,152.96x = 372,714,122.65
  5. Step 5: Solve for x
    x = 372,714,122.65/21,152.96
  6. Step 6: Final answer
    x = 17,619.95

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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.