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Finding the Fourth Proportional to 30,419.80, 45,621.60 and 9,359.80

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Solution

The fourth proportional to 30,419.80, 45,621.60 and 9,359.80 is: 14,037.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,419.80 : 45,621.60 = 9,359.80 : x
  2. Step 2: Convert to fraction form
    30,419.80/45,621.60 = 9,359.80/x
  3. Step 3: Cross multiply
    30,419.80x = 45,621.60 × 9,359.80
  4. Step 4: Simplify right side
    30,419.80x = 427,009,051.68
  5. Step 5: Solve for x
    x = 427,009,051.68/30,419.80
  6. Step 6: Final answer
    x = 14,037.21

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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.