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Finding the Fourth Proportional to 57,528, 86,300.64 and 20,600.64

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Solution

The fourth proportional to 57,528, 86,300.64 and 20,600.64 is: 30,904.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,528 : 86,300.64 = 20,600.64 : x
  2. Step 2: Convert to fraction form
    57,528/86,300.64 = 20,600.64/x
  3. Step 3: Cross multiply
    57,528x = 86,300.64 × 20,600.64
  4. Step 4: Simplify right side
    57,528x = 1,777,848,416.41
  5. Step 5: Solve for x
    x = 1,777,848,416.41/57,528
  6. Step 6: Final answer
    x = 30,904.05

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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.