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Finding the Fourth Proportional to 10,503.84, 15,756.64 and 2,712.80

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Solution

The fourth proportional to 10,503.84, 15,756.64 and 2,712.80 is: 4,069.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,503.84 : 15,756.64 = 2,712.80 : x
  2. Step 2: Convert to fraction form
    10,503.84/15,756.64 = 2,712.80/x
  3. Step 3: Cross multiply
    10,503.84x = 15,756.64 × 2,712.80
  4. Step 4: Simplify right side
    10,503.84x = 42,744,612.99
  5. Step 5: Solve for x
    x = 42,744,612.99/10,503.84
  6. Step 6: Final answer
    x = 4,069.43

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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.