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Finding the Fourth Proportional to 7,759.77, 10,718.10 and 5,631.90

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Solution

The fourth proportional to 7,759.77, 10,718.10 and 5,631.90 is: 7,779.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,759.77 : 10,718.10 = 5,631.90 : x
  2. Step 2: Convert to fraction form
    7,759.77/10,718.10 = 5,631.90/x
  3. Step 3: Cross multiply
    7,759.77x = 10,718.10 × 5,631.90
  4. Step 4: Simplify right side
    7,759.77x = 60,363,267.39
  5. Step 5: Solve for x
    x = 60,363,267.39/7,759.77
  6. Step 6: Final answer
    x = 7,779.00

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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.