Home / 38,780.28-53,516.58-21,784.56

Finding the Fourth Proportional to 38,780.28, 53,516.58 and 21,784.56

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Solution

The fourth proportional to 38,780.28, 53,516.58 and 21,784.56 is: 30,062.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,780.28 : 53,516.58 = 21,784.56 : x
  2. Step 2: Convert to fraction form
    38,780.28/53,516.58 = 21,784.56/x
  3. Step 3: Cross multiply
    38,780.28x = 53,516.58 × 21,784.56
  4. Step 4: Simplify right side
    38,780.28x = 1,165,835,148.00
  5. Step 5: Solve for x
    x = 1,165,835,148.00/38,780.28
  6. Step 6: Final answer
    x = 30,062.58

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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.