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Finding the Fourth Proportional to 42,907.73, 64,402.97 and 20,736.68

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Solution

The fourth proportional to 42,907.73, 64,402.97 and 20,736.68 is: 31,125.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,907.73 : 64,402.97 = 20,736.68 : x
  2. Step 2: Convert to fraction form
    42,907.73/64,402.97 = 20,736.68/x
  3. Step 3: Cross multiply
    42,907.73x = 64,402.97 × 20,736.68
  4. Step 4: Simplify right side
    42,907.73x = 1,335,503,354.24
  5. Step 5: Solve for x
    x = 1,335,503,354.24/42,907.73
  6. Step 6: Final answer
    x = 31,125.01

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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.