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Finding the Fourth Proportional to 7,774.59, 10,728.95 and 4,237.80

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Solution

The fourth proportional to 7,774.59, 10,728.95 and 4,237.80 is: 5,848.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,774.59 : 10,728.95 = 4,237.80 : x
  2. Step 2: Convert to fraction form
    7,774.59/10,728.95 = 4,237.80/x
  3. Step 3: Cross multiply
    7,774.59x = 10,728.95 × 4,237.80
  4. Step 4: Simplify right side
    7,774.59x = 45,467,144.31
  5. Step 5: Solve for x
    x = 45,467,144.31/7,774.59
  6. Step 6: Final answer
    x = 5,848.17

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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.