Home / 12,947.19-19,440.23-7,406.79

Finding the Fourth Proportional to 12,947.19, 19,440.23 and 7,406.79

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Solution

The fourth proportional to 12,947.19, 19,440.23 and 7,406.79 is: 11,121.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,947.19 : 19,440.23 = 7,406.79 : x
  2. Step 2: Convert to fraction form
    12,947.19/19,440.23 = 7,406.79/x
  3. Step 3: Cross multiply
    12,947.19x = 19,440.23 × 7,406.79
  4. Step 4: Simplify right side
    12,947.19x = 143,989,664.13
  5. Step 5: Solve for x
    x = 143,989,664.13/12,947.19
  6. Step 6: Final answer
    x = 11,121.31

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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.