Home / 28,918.80-43,378.20-28,611.60

Finding the Fourth Proportional to 28,918.80, 43,378.20 and 28,611.60

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Solution

The fourth proportional to 28,918.80, 43,378.20 and 28,611.60 is: 42,917.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,918.80 : 43,378.20 = 28,611.60 : x
  2. Step 2: Convert to fraction form
    28,918.80/43,378.20 = 28,611.60/x
  3. Step 3: Cross multiply
    28,918.80x = 43,378.20 × 28,611.60
  4. Step 4: Simplify right side
    28,918.80x = 1,241,119,707.12
  5. Step 5: Solve for x
    x = 1,241,119,707.12/28,918.80
  6. Step 6: Final answer
    x = 42,917.40

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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.