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Finding the Fourth Proportional to 11,454.95, 15,808.94 and 6,420.02

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Solution

The fourth proportional to 11,454.95, 15,808.94 and 6,420.02 is: 8,860.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,454.95 : 15,808.94 = 6,420.02 : x
  2. Step 2: Convert to fraction form
    11,454.95/15,808.94 = 6,420.02/x
  3. Step 3: Cross multiply
    11,454.95x = 15,808.94 × 6,420.02
  4. Step 4: Simplify right side
    11,454.95x = 101,493,766.55
  5. Step 5: Solve for x
    x = 101,493,766.55/11,454.95
  6. Step 6: Final answer
    x = 8,860.25

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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.