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Finding the Fourth Proportional to 35,447.60, 53,154.48 and 20,660.78

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Solution

The fourth proportional to 35,447.60, 53,154.48 and 20,660.78 is: 30,981.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,447.60 : 53,154.48 = 20,660.78 : x
  2. Step 2: Convert to fraction form
    35,447.60/53,154.48 = 20,660.78/x
  3. Step 3: Cross multiply
    35,447.60x = 53,154.48 × 20,660.78
  4. Step 4: Simplify right side
    35,447.60x = 1,098,213,017.29
  5. Step 5: Solve for x
    x = 1,098,213,017.29/35,447.60
  6. Step 6: Final answer
    x = 30,981.31

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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.