Home / 30,611.60-45,946.20-18,947.60

Finding the Fourth Proportional to 30,611.60, 45,946.20 and 18,947.60

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Solution

The fourth proportional to 30,611.60, 45,946.20 and 18,947.60 is: 28,439.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,611.60 : 45,946.20 = 18,947.60 : x
  2. Step 2: Convert to fraction form
    30,611.60/45,946.20 = 18,947.60/x
  3. Step 3: Cross multiply
    30,611.60x = 45,946.20 × 18,947.60
  4. Step 4: Simplify right side
    30,611.60x = 870,570,219.12
  5. Step 5: Solve for x
    x = 870,570,219.12/30,611.60
  6. Step 6: Final answer
    x = 28,439.23

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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.