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Finding the Fourth Proportional to 40,826, 61,239 and 13,124

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Solution

The fourth proportional to 40,826, 61,239 and 13,124 is: 19,686

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,826 : 61,239 = 13,124 : x
  2. Step 2: Convert to fraction form
    40,826/61,239 = 13,124/x
  3. Step 3: Cross multiply
    40,826x = 61,239 × 13,124
  4. Step 4: Simplify right side
    40,826x = 803,700,636
  5. Step 5: Solve for x
    x = 803,700,636/40,826
  6. Step 6: Final answer
    x = 19,686

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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.