Home / 30,905.47-46,360.05-8,720.74

Finding the Fourth Proportional to 30,905.47, 46,360.05 and 8,720.74

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Solution

The fourth proportional to 30,905.47, 46,360.05 and 8,720.74 is: 13,081.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,905.47 : 46,360.05 = 8,720.74 : x
  2. Step 2: Convert to fraction form
    30,905.47/46,360.05 = 8,720.74/x
  3. Step 3: Cross multiply
    30,905.47x = 46,360.05 × 8,720.74
  4. Step 4: Simplify right side
    30,905.47x = 404,293,942.44
  5. Step 5: Solve for x
    x = 404,293,942.44/30,905.47
  6. Step 6: Final answer
    x = 13,081.63

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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.