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Finding the Fourth Proportional to 12,655.40, 18,985.73 and 6,333.55

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Solution

The fourth proportional to 12,655.40, 18,985.73 and 6,333.55 is: 9,501.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,655.40 : 18,985.73 = 6,333.55 : x
  2. Step 2: Convert to fraction form
    12,655.40/18,985.73 = 6,333.55/x
  3. Step 3: Cross multiply
    12,655.40x = 18,985.73 × 6,333.55
  4. Step 4: Simplify right side
    12,655.40x = 120,247,097.95
  5. Step 5: Solve for x
    x = 120,247,097.95/12,655.40
  6. Step 6: Final answer
    x = 9,501.65

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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.