Home / 19,783.20-29,607.60-11,997.60

Finding the Fourth Proportional to 19,783.20, 29,607.60 and 11,997.60

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Solution

The fourth proportional to 19,783.20, 29,607.60 and 11,997.60 is: 17,955.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,783.20 : 29,607.60 = 11,997.60 : x
  2. Step 2: Convert to fraction form
    19,783.20/29,607.60 = 11,997.60/x
  3. Step 3: Cross multiply
    19,783.20x = 29,607.60 × 11,997.60
  4. Step 4: Simplify right side
    19,783.20x = 355,220,141.76
  5. Step 5: Solve for x
    x = 355,220,141.76/19,783.20
  6. Step 6: Final answer
    x = 17,955.65

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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.