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Finding the Fourth Proportional to 38,500.50, 53,130.69 and 20,836.50

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Solution

The fourth proportional to 38,500.50, 53,130.69 and 20,836.50 is: 28,754.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,500.50 : 53,130.69 = 20,836.50 : x
  2. Step 2: Convert to fraction form
    38,500.50/53,130.69 = 20,836.50/x
  3. Step 3: Cross multiply
    38,500.50x = 53,130.69 × 20,836.50
  4. Step 4: Simplify right side
    38,500.50x = 1,107,057,622.19
  5. Step 5: Solve for x
    x = 1,107,057,622.19/38,500.50
  6. Step 6: Final answer
    x = 28,754.37

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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.