Home / 39,688.65-54,768.62-21,783.96

Finding the Fourth Proportional to 39,688.65, 54,768.62 and 21,783.96

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Solution

The fourth proportional to 39,688.65, 54,768.62 and 21,783.96 is: 30,060.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,688.65 : 54,768.62 = 21,783.96 : x
  2. Step 2: Convert to fraction form
    39,688.65/54,768.62 = 21,783.96/x
  3. Step 3: Cross multiply
    39,688.65x = 54,768.62 × 21,783.96
  4. Step 4: Simplify right side
    39,688.65x = 1,193,077,318.42
  5. Step 5: Solve for x
    x = 1,193,077,318.42/39,688.65
  6. Step 6: Final answer
    x = 30,060.92

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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.