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Finding the Fourth Proportional to 30,277.60, 45,416.40 and 20,946.40

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Solution

The fourth proportional to 30,277.60, 45,416.40 and 20,946.40 is: 31,419.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,277.60 : 45,416.40 = 20,946.40 : x
  2. Step 2: Convert to fraction form
    30,277.60/45,416.40 = 20,946.40/x
  3. Step 3: Cross multiply
    30,277.60x = 45,416.40 × 20,946.40
  4. Step 4: Simplify right side
    30,277.60x = 951,310,080.96
  5. Step 5: Solve for x
    x = 951,310,080.96/30,277.60
  6. Step 6: Final answer
    x = 31,419.60

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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.