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Finding the Fourth Proportional to 38,784.01, 53,516.10 and 21,785.00

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Solution

The fourth proportional to 38,784.01, 53,516.10 and 21,785.00 is: 30,060.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,784.01 : 53,516.10 = 21,785.00 : x
  2. Step 2: Convert to fraction form
    38,784.01/53,516.10 = 21,785.00/x
  3. Step 3: Cross multiply
    38,784.01x = 53,516.10 × 21,785.00
  4. Step 4: Simplify right side
    38,784.01x = 1,165,847,970.92
  5. Step 5: Solve for x
    x = 1,165,847,970.92/38,784.01
  6. Step 6: Final answer
    x = 30,060.02

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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.