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Finding the Fourth Proportional to 12,875.73, 17,762.79 and 8,398.45

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Solution

The fourth proportional to 12,875.73, 17,762.79 and 8,398.45 is: 11,586.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,875.73 : 17,762.79 = 8,398.45 : x
  2. Step 2: Convert to fraction form
    12,875.73/17,762.79 = 8,398.45/x
  3. Step 3: Cross multiply
    12,875.73x = 17,762.79 × 8,398.45
  4. Step 4: Simplify right side
    12,875.73x = 149,179,903.68
  5. Step 5: Solve for x
    x = 149,179,903.68/12,875.73
  6. Step 6: Final answer
    x = 11,586.13

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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.