Home / 18,918.80-28,378.28-5,771.32

Finding the Fourth Proportional to 18,918.80, 28,378.28 and 5,771.32

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Solution

The fourth proportional to 18,918.80, 28,378.28 and 5,771.32 is: 8,657.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,918.80 : 28,378.28 = 5,771.32 : x
  2. Step 2: Convert to fraction form
    18,918.80/28,378.28 = 5,771.32/x
  3. Step 3: Cross multiply
    18,918.80x = 28,378.28 × 5,771.32
  4. Step 4: Simplify right side
    18,918.80x = 163,780,134.93
  5. Step 5: Solve for x
    x = 163,780,134.93/18,918.80
  6. Step 6: Final answer
    x = 8,657.00

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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.