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Finding the Fourth Proportional to 35,364.78, 48,783.06 and 21,209.40

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Solution

The fourth proportional to 35,364.78, 48,783.06 and 21,209.40 is: 29,256.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,364.78 : 48,783.06 = 21,209.40 : x
  2. Step 2: Convert to fraction form
    35,364.78/48,783.06 = 21,209.40/x
  3. Step 3: Cross multiply
    35,364.78x = 48,783.06 × 21,209.40
  4. Step 4: Simplify right side
    35,364.78x = 1,034,659,432.76
  5. Step 5: Solve for x
    x = 1,034,659,432.76/35,364.78
  6. Step 6: Final answer
    x = 29,256.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.