Home / 20,856.60-28,782.57-11,903.93

Finding the Fourth Proportional to 20,856.60, 28,782.57 and 11,903.93

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Solution

The fourth proportional to 20,856.60, 28,782.57 and 11,903.93 is: 16,427.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.60 : 28,782.57 = 11,903.93 : x
  2. Step 2: Convert to fraction form
    20,856.60/28,782.57 = 11,903.93/x
  3. Step 3: Cross multiply
    20,856.60x = 28,782.57 × 11,903.93
  4. Step 4: Simplify right side
    20,856.60x = 342,625,554.59
  5. Step 5: Solve for x
    x = 342,625,554.59/20,856.60
  6. Step 6: Final answer
    x = 16,427.68

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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.