Home / 12,905.80-19,358.70-10,313.80

Finding the Fourth Proportional to 12,905.80, 19,358.70 and 10,313.80

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Solution

The fourth proportional to 12,905.80, 19,358.70 and 10,313.80 is: 15,470.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,905.80 : 19,358.70 = 10,313.80 : x
  2. Step 2: Convert to fraction form
    12,905.80/19,358.70 = 10,313.80/x
  3. Step 3: Cross multiply
    12,905.80x = 19,358.70 × 10,313.80
  4. Step 4: Simplify right side
    12,905.80x = 199,661,760.06
  5. Step 5: Solve for x
    x = 199,661,760.06/12,905.80
  6. Step 6: Final answer
    x = 15,470.70

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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.