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Finding the Fourth Proportional to 30,905.76, 46,355.64 and 8,718.80

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Solution

The fourth proportional to 30,905.76, 46,355.64 and 8,718.80 is: 13,077.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,905.76 : 46,355.64 = 8,718.80 : x
  2. Step 2: Convert to fraction form
    30,905.76/46,355.64 = 8,718.80/x
  3. Step 3: Cross multiply
    30,905.76x = 46,355.64 × 8,718.80
  4. Step 4: Simplify right side
    30,905.76x = 404,165,554.03
  5. Step 5: Solve for x
    x = 404,165,554.03/30,905.76
  6. Step 6: Final answer
    x = 13,077.35

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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.