Home / 28,769.40-43,170.78-12,128.16

Finding the Fourth Proportional to 28,769.40, 43,170.78 and 12,128.16

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Solution

The fourth proportional to 28,769.40, 43,170.78 and 12,128.16 is: 18,199.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,769.40 : 43,170.78 = 12,128.16 : x
  2. Step 2: Convert to fraction form
    28,769.40/43,170.78 = 12,128.16/x
  3. Step 3: Cross multiply
    28,769.40x = 43,170.78 × 12,128.16
  4. Step 4: Simplify right side
    28,769.40x = 523,582,127.16
  5. Step 5: Solve for x
    x = 523,582,127.16/28,769.40
  6. Step 6: Final answer
    x = 18,199.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.