Home / 12,975.35-17,905.74-7,939.18

Finding the Fourth Proportional to 12,975.35, 17,905.74 and 7,939.18

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Solution

The fourth proportional to 12,975.35, 17,905.74 and 7,939.18 is: 10,955.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,975.35 : 17,905.74 = 7,939.18 : x
  2. Step 2: Convert to fraction form
    12,975.35/17,905.74 = 7,939.18/x
  3. Step 3: Cross multiply
    12,975.35x = 17,905.74 × 7,939.18
  4. Step 4: Simplify right side
    12,975.35x = 142,156,803.36
  5. Step 5: Solve for x
    x = 142,156,803.36/12,975.35
  6. Step 6: Final answer
    x = 10,955.91

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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.