Home / 20,856.29-28,782.14-11,903.61

Finding the Fourth Proportional to 20,856.29, 28,782.14 and 11,903.61

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Solution

The fourth proportional to 20,856.29, 28,782.14 and 11,903.61 is: 16,427.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.29 : 28,782.14 = 11,903.61 : x
  2. Step 2: Convert to fraction form
    20,856.29/28,782.14 = 11,903.61/x
  3. Step 3: Cross multiply
    20,856.29x = 28,782.14 × 11,903.61
  4. Step 4: Simplify right side
    20,856.29x = 342,611,399.28
  5. Step 5: Solve for x
    x = 342,611,399.28/20,856.29
  6. Step 6: Final answer
    x = 16,427.25

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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.