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Finding the Fourth Proportional to 38,647.60, 58,009.80 and 18,948.40

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Solution

The fourth proportional to 38,647.60, 58,009.80 and 18,948.40 is: 28,441.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,647.60 : 58,009.80 = 18,948.40 : x
  2. Step 2: Convert to fraction form
    38,647.60/58,009.80 = 18,948.40/x
  3. Step 3: Cross multiply
    38,647.60x = 58,009.80 × 18,948.40
  4. Step 4: Simplify right side
    38,647.60x = 1,099,192,894.32
  5. Step 5: Solve for x
    x = 1,099,192,894.32/38,647.60
  6. Step 6: Final answer
    x = 28,441.43

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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.