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Finding the Fourth Proportional to 15,202.02, 20,978.73 and 8,487.59

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Solution

The fourth proportional to 15,202.02, 20,978.73 and 8,487.59 is: 11,712.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,202.02 : 20,978.73 = 8,487.59 : x
  2. Step 2: Convert to fraction form
    15,202.02/20,978.73 = 8,487.59/x
  3. Step 3: Cross multiply
    15,202.02x = 20,978.73 × 8,487.59
  4. Step 4: Simplify right side
    15,202.02x = 178,058,754.07
  5. Step 5: Solve for x
    x = 178,058,754.07/15,202.02
  6. Step 6: Final answer
    x = 11,712.84

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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.