Home / 11,282.34-15,555.20-7,739.40

Finding the Fourth Proportional to 11,282.34, 15,555.20 and 7,739.40

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Solution

The fourth proportional to 11,282.34, 15,555.20 and 7,739.40 is: 10,670.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,282.34 : 15,555.20 = 7,739.40 : x
  2. Step 2: Convert to fraction form
    11,282.34/15,555.20 = 7,739.40/x
  3. Step 3: Cross multiply
    11,282.34x = 15,555.20 × 7,739.40
  4. Step 4: Simplify right side
    11,282.34x = 120,387,876.18
  5. Step 5: Solve for x
    x = 120,387,876.18/11,282.34
  6. Step 6: Final answer
    x = 10,670.47

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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.