Home / 39,688.64-54,770.12-21,783.93

Finding the Fourth Proportional to 39,688.64, 54,770.12 and 21,783.93

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Solution

The fourth proportional to 39,688.64, 54,770.12 and 21,783.93 is: 30,061.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,688.64 : 54,770.12 = 21,783.93 : x
  2. Step 2: Convert to fraction form
    39,688.64/54,770.12 = 21,783.93/x
  3. Step 3: Cross multiply
    39,688.64x = 54,770.12 × 21,783.93
  4. Step 4: Simplify right side
    39,688.64x = 1,193,108,351.25
  5. Step 5: Solve for x
    x = 1,193,108,351.25/39,688.64
  6. Step 6: Final answer
    x = 30,061.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.