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Finding the Fourth Proportional to 7,780.91, 11,655.77 and 7,372.08

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Solution

The fourth proportional to 7,780.91, 11,655.77 and 7,372.08 is: 11,043.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,780.91 : 11,655.77 = 7,372.08 : x
  2. Step 2: Convert to fraction form
    7,780.91/11,655.77 = 7,372.08/x
  3. Step 3: Cross multiply
    7,780.91x = 11,655.77 × 7,372.08
  4. Step 4: Simplify right side
    7,780.91x = 85,927,232.04
  5. Step 5: Solve for x
    x = 85,927,232.04/7,780.91
  6. Step 6: Final answer
    x = 11,043.35

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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.