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Finding the Fourth Proportional to 38,980.88, 58,480.10 and 12,328.49

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Solution

The fourth proportional to 38,980.88, 58,480.10 and 12,328.49 is: 18,495.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,980.88 : 58,480.10 = 12,328.49 : x
  2. Step 2: Convert to fraction form
    38,980.88/58,480.10 = 12,328.49/x
  3. Step 3: Cross multiply
    38,980.88x = 58,480.10 × 12,328.49
  4. Step 4: Simplify right side
    38,980.88x = 720,971,143.47
  5. Step 5: Solve for x
    x = 720,971,143.47/38,980.88
  6. Step 6: Final answer
    x = 18,495.51

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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.