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Finding the Fourth Proportional to 40,662.81, 60,970.12 and 12,574.55

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Solution

The fourth proportional to 40,662.81, 60,970.12 and 12,574.55 is: 18,854.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,662.81 : 60,970.12 = 12,574.55 : x
  2. Step 2: Convert to fraction form
    40,662.81/60,970.12 = 12,574.55/x
  3. Step 3: Cross multiply
    40,662.81x = 60,970.12 × 12,574.55
  4. Step 4: Simplify right side
    40,662.81x = 766,671,822.45
  5. Step 5: Solve for x
    x = 766,671,822.45/40,662.81
  6. Step 6: Final answer
    x = 18,854.37

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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.