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Finding the Fourth Proportional to 38,690.76, 58,027.56 and 13,388.76

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Solution

The fourth proportional to 38,690.76, 58,027.56 and 13,388.76 is: 20,080.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,690.76 : 58,027.56 = 13,388.76 : x
  2. Step 2: Convert to fraction form
    38,690.76/58,027.56 = 13,388.76/x
  3. Step 3: Cross multiply
    38,690.76x = 58,027.56 × 13,388.76
  4. Step 4: Simplify right side
    38,690.76x = 776,917,074.23
  5. Step 5: Solve for x
    x = 776,917,074.23/38,690.76
  6. Step 6: Final answer
    x = 20,080.17

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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.