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Finding the Fourth Proportional to 12,875.76, 19,313.64 and 8,914.66

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Solution

The fourth proportional to 12,875.76, 19,313.64 and 8,914.66 is: 13,371.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,875.76 : 19,313.64 = 8,914.66 : x
  2. Step 2: Convert to fraction form
    12,875.76/19,313.64 = 8,914.66/x
  3. Step 3: Cross multiply
    12,875.76x = 19,313.64 × 8,914.66
  4. Step 4: Simplify right side
    12,875.76x = 172,174,485.68
  5. Step 5: Solve for x
    x = 172,174,485.68/12,875.76
  6. Step 6: Final answer
    x = 13,371.99

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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.