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Finding the Fourth Proportional to 12,605.78, 18,875.64 and 8,887.88

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Solution

The fourth proportional to 12,605.78, 18,875.64 and 8,887.88 is: 13,308.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,605.78 : 18,875.64 = 8,887.88 : x
  2. Step 2: Convert to fraction form
    12,605.78/18,875.64 = 8,887.88/x
  3. Step 3: Cross multiply
    12,605.78x = 18,875.64 × 8,887.88
  4. Step 4: Simplify right side
    12,605.78x = 167,764,423.24
  5. Step 5: Solve for x
    x = 167,764,423.24/12,605.78
  6. Step 6: Final answer
    x = 13,308.53

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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.