Home / 13,750.72-18,976.45-7,782.32

Finding the Fourth Proportional to 13,750.72, 18,976.45 and 7,782.32

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Solution

The fourth proportional to 13,750.72, 18,976.45 and 7,782.32 is: 10,739.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,750.72 : 18,976.45 = 7,782.32 : x
  2. Step 2: Convert to fraction form
    13,750.72/18,976.45 = 7,782.32/x
  3. Step 3: Cross multiply
    13,750.72x = 18,976.45 × 7,782.32
  4. Step 4: Simplify right side
    13,750.72x = 147,680,806.36
  5. Step 5: Solve for x
    x = 147,680,806.36/13,750.72
  6. Step 6: Final answer
    x = 10,739.86

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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.