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Finding the Fourth Proportional to 39,885.35, 59,828.03 and 18,818.47

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Solution

The fourth proportional to 39,885.35, 59,828.03 and 18,818.47 is: 28,227.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,885.35 : 59,828.03 = 18,818.47 : x
  2. Step 2: Convert to fraction form
    39,885.35/59,828.03 = 18,818.47/x
  3. Step 3: Cross multiply
    39,885.35x = 59,828.03 × 18,818.47
  4. Step 4: Simplify right side
    39,885.35x = 1,125,871,594.48
  5. Step 5: Solve for x
    x = 1,125,871,594.48/39,885.35
  6. Step 6: Final answer
    x = 28,227.70

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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.