Home / 15,485.84-21,371.76-8,773.60

Finding the Fourth Proportional to 15,485.84, 21,371.76 and 8,773.60

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Solution

The fourth proportional to 15,485.84, 21,371.76 and 8,773.60 is: 12,108.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,485.84 : 21,371.76 = 8,773.60 : x
  2. Step 2: Convert to fraction form
    15,485.84/21,371.76 = 8,773.60/x
  3. Step 3: Cross multiply
    15,485.84x = 21,371.76 × 8,773.60
  4. Step 4: Simplify right side
    15,485.84x = 187,507,273.54
  5. Step 5: Solve for x
    x = 187,507,273.54/15,485.84
  6. Step 6: Final answer
    x = 12,108.30

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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.