Home / 18,783.57-28,175.37-7,688.34

Finding the Fourth Proportional to 18,783.57, 28,175.37 and 7,688.34

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Solution

The fourth proportional to 18,783.57, 28,175.37 and 7,688.34 is: 11,532.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,783.57 : 28,175.37 = 7,688.34 : x
  2. Step 2: Convert to fraction form
    18,783.57/28,175.37 = 7,688.34/x
  3. Step 3: Cross multiply
    18,783.57x = 28,175.37 × 7,688.34
  4. Step 4: Simplify right side
    18,783.57x = 216,621,824.19
  5. Step 5: Solve for x
    x = 216,621,824.19/18,783.57
  6. Step 6: Final answer
    x = 11,532.52

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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.