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Finding the Fourth Proportional to 40,718.44, 61,038.78 and 12,998.44

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Solution

The fourth proportional to 40,718.44, 61,038.78 and 12,998.44 is: 19,485.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,718.44 : 61,038.78 = 12,998.44 : x
  2. Step 2: Convert to fraction form
    40,718.44/61,038.78 = 12,998.44/x
  3. Step 3: Cross multiply
    40,718.44x = 61,038.78 × 12,998.44
  4. Step 4: Simplify right side
    40,718.44x = 793,408,919.50
  5. Step 5: Solve for x
    x = 793,408,919.50/40,718.44
  6. Step 6: Final answer
    x = 19,485.25

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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.