Home / 20,900.24-28,840.24-12,939.52

Finding the Fourth Proportional to 20,900.24, 28,840.24 and 12,939.52

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Solution

The fourth proportional to 20,900.24, 28,840.24 and 12,939.52 is: 17,855.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,900.24 : 28,840.24 = 12,939.52 : x
  2. Step 2: Convert to fraction form
    20,900.24/28,840.24 = 12,939.52/x
  3. Step 3: Cross multiply
    20,900.24x = 28,840.24 × 12,939.52
  4. Step 4: Simplify right side
    20,900.24x = 373,178,862.28
  5. Step 5: Solve for x
    x = 373,178,862.28/20,900.24
  6. Step 6: Final answer
    x = 17,855.24

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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.