Home / 20,386.02-28,133.00-12,318.56

Finding the Fourth Proportional to 20,386.02, 28,133.00 and 12,318.56

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Solution

The fourth proportional to 20,386.02, 28,133.00 and 12,318.56 is: 16,999.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,386.02 : 28,133.00 = 12,318.56 : x
  2. Step 2: Convert to fraction form
    20,386.02/28,133.00 = 12,318.56/x
  3. Step 3: Cross multiply
    20,386.02x = 28,133.00 × 12,318.56
  4. Step 4: Simplify right side
    20,386.02x = 346,557,997.92
  5. Step 5: Solve for x
    x = 346,557,997.92/20,386.02
  6. Step 6: Final answer
    x = 16,999.78

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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.