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Finding the Fourth Proportional to 18,684.74, 28,058.85 and 12,484.59

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Solution

The fourth proportional to 18,684.74, 28,058.85 and 12,484.59 is: 18,748.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,684.74 : 28,058.85 = 12,484.59 : x
  2. Step 2: Convert to fraction form
    18,684.74/28,058.85 = 12,484.59/x
  3. Step 3: Cross multiply
    18,684.74x = 28,058.85 × 12,484.59
  4. Step 4: Simplify right side
    18,684.74x = 350,303,238.12
  5. Step 5: Solve for x
    x = 350,303,238.12/18,684.74
  6. Step 6: Final answer
    x = 18,748.09

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1.5x scale

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.