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Finding the Fourth Proportional to 5,368.78, 7,407.74 and 5,191.80

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Solution

The fourth proportional to 5,368.78, 7,407.74 and 5,191.80 is: 7,163.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,368.78 : 7,407.74 = 5,191.80 : x
  2. Step 2: Convert to fraction form
    5,368.78/7,407.74 = 5,191.80/x
  3. Step 3: Cross multiply
    5,368.78x = 7,407.74 × 5,191.80
  4. Step 4: Simplify right side
    5,368.78x = 38,459,450.79
  5. Step 5: Solve for x
    x = 38,459,450.79/5,368.78
  6. Step 6: Final answer
    x = 7,163.53

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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.