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Finding the Fourth Proportional to 40,259.84, 60,398.40 and 12,560

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Solution

The fourth proportional to 40,259.84, 60,398.40 and 12,560 is: 18,842.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,259.84 : 60,398.40 = 12,560 : x
  2. Step 2: Convert to fraction form
    40,259.84/60,398.40 = 12,560/x
  3. Step 3: Cross multiply
    40,259.84x = 60,398.40 × 12,560
  4. Step 4: Simplify right side
    40,259.84x = 758,603,904
  5. Step 5: Solve for x
    x = 758,603,904/40,259.84
  6. Step 6: Final answer
    x = 18,842.70

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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.