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Finding the Fourth Proportional to 7,775.80, 11,663.70 and 5,313.40

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Solution

The fourth proportional to 7,775.80, 11,663.70 and 5,313.40 is: 7,970.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,775.80 : 11,663.70 = 5,313.40 : x
  2. Step 2: Convert to fraction form
    7,775.80/11,663.70 = 5,313.40/x
  3. Step 3: Cross multiply
    7,775.80x = 11,663.70 × 5,313.40
  4. Step 4: Simplify right side
    7,775.80x = 61,973,903.58
  5. Step 5: Solve for x
    x = 61,973,903.58/7,775.80
  6. Step 6: Final answer
    x = 7,970.10

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Similar ratio
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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.