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Finding the Fourth Proportional to 39,461, 59,220.66 and 18,684.50

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Solution

The fourth proportional to 39,461, 59,220.66 and 18,684.50 is: 28,040.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,461 : 59,220.66 = 18,684.50 : x
  2. Step 2: Convert to fraction form
    39,461/59,220.66 = 18,684.50/x
  3. Step 3: Cross multiply
    39,461x = 59,220.66 × 18,684.50
  4. Step 4: Simplify right side
    39,461x = 1,106,508,421.77
  5. Step 5: Solve for x
    x = 1,106,508,421.77/39,461
  6. Step 6: Final answer
    x = 28,040.56

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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.