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Finding the Fourth Proportional to 39,989, 59,984.58 and 12,287

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Solution

The fourth proportional to 39,989, 59,984.58 and 12,287 is: 18,430.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,989 : 59,984.58 = 12,287 : x
  2. Step 2: Convert to fraction form
    39,989/59,984.58 = 12,287/x
  3. Step 3: Cross multiply
    39,989x = 59,984.58 × 12,287
  4. Step 4: Simplify right side
    39,989x = 737,030,534.46
  5. Step 5: Solve for x
    x = 737,030,534.46/39,989
  6. Step 6: Final answer
    x = 18,430.83

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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.