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Finding the Fourth Proportional to 40,658.81, 60,964.12 and 12,570.55

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Solution

The fourth proportional to 40,658.81, 60,964.12 and 12,570.55 is: 18,848.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,658.81 : 60,964.12 = 12,570.55 : x
  2. Step 2: Convert to fraction form
    40,658.81/60,964.12 = 12,570.55/x
  3. Step 3: Cross multiply
    40,658.81x = 60,964.12 × 12,570.55
  4. Step 4: Simplify right side
    40,658.81x = 766,352,518.67
  5. Step 5: Solve for x
    x = 766,352,518.67/40,658.81
  6. Step 6: Final answer
    x = 18,848.38

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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.