Home / 20,315.36-28,027.32-12,758.48

Finding the Fourth Proportional to 20,315.36, 28,027.32 and 12,758.48

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Solution

The fourth proportional to 20,315.36, 28,027.32 and 12,758.48 is: 17,601.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.36 : 28,027.32 = 12,758.48 : x
  2. Step 2: Convert to fraction form
    20,315.36/28,027.32 = 12,758.48/x
  3. Step 3: Cross multiply
    20,315.36x = 28,027.32 × 12,758.48
  4. Step 4: Simplify right side
    20,315.36x = 357,586,001.67
  5. Step 5: Solve for x
    x = 357,586,001.67/20,315.36
  6. Step 6: Final answer
    x = 17,601.76

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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.