Home / 38,690.90-58,028.13-12,388.58

Finding the Fourth Proportional to 38,690.90, 58,028.13 and 12,388.58

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Solution

The fourth proportional to 38,690.90, 58,028.13 and 12,388.58 is: 18,580.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,690.90 : 58,028.13 = 12,388.58 : x
  2. Step 2: Convert to fraction form
    38,690.90/58,028.13 = 12,388.58/x
  3. Step 3: Cross multiply
    38,690.90x = 58,028.13 × 12,388.58
  4. Step 4: Simplify right side
    38,690.90x = 718,885,840.61
  5. Step 5: Solve for x
    x = 718,885,840.61/38,690.90
  6. Step 6: Final answer
    x = 18,580.23

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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.