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Finding the Fourth Proportional to 38,672.70, 58,009.05 and 18,989.70

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Solution

The fourth proportional to 38,672.70, 58,009.05 and 18,989.70 is: 28,484.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,672.70 : 58,009.05 = 18,989.70 : x
  2. Step 2: Convert to fraction form
    38,672.70/58,009.05 = 18,989.70/x
  3. Step 3: Cross multiply
    38,672.70x = 58,009.05 × 18,989.70
  4. Step 4: Simplify right side
    38,672.70x = 1,101,574,456.79
  5. Step 5: Solve for x
    x = 1,101,574,456.79/38,672.70
  6. Step 6: Final answer
    x = 28,484.55

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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.