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Finding the Fourth Proportional to 45,640.84, 68,461.25 and 18,986.32

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Solution

The fourth proportional to 45,640.84, 68,461.25 and 18,986.32 is: 28,479.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,640.84 : 68,461.25 = 18,986.32 : x
  2. Step 2: Convert to fraction form
    45,640.84/68,461.25 = 18,986.32/x
  3. Step 3: Cross multiply
    45,640.84x = 68,461.25 × 18,986.32
  4. Step 4: Simplify right side
    45,640.84x = 1,299,827,490.09
  5. Step 5: Solve for x
    x = 1,299,827,490.09/45,640.84
  6. Step 6: Final answer
    x = 28,479.48

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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.