Home / 21,155.20-29,187.02-12,202.47

Finding the Fourth Proportional to 21,155.20, 29,187.02 and 12,202.47

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Solution

The fourth proportional to 21,155.20, 29,187.02 and 12,202.47 is: 16,835.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.20 : 29,187.02 = 12,202.47 : x
  2. Step 2: Convert to fraction form
    21,155.20/29,187.02 = 12,202.47/x
  3. Step 3: Cross multiply
    21,155.20x = 29,187.02 × 12,202.47
  4. Step 4: Simplify right side
    21,155.20x = 356,153,674.93
  5. Step 5: Solve for x
    x = 356,153,674.93/21,155.20
  6. Step 6: Final answer
    x = 16,835.28

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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.