Home / 20,889.42-28,826.85-11,457.39

Finding the Fourth Proportional to 20,889.42, 28,826.85 and 11,457.39

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Solution

The fourth proportional to 20,889.42, 28,826.85 and 11,457.39 is: 15,810.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.42 : 28,826.85 = 11,457.39 : x
  2. Step 2: Convert to fraction form
    20,889.42/28,826.85 = 11,457.39/x
  3. Step 3: Cross multiply
    20,889.42x = 28,826.85 × 11,457.39
  4. Step 4: Simplify right side
    20,889.42x = 330,280,462.92
  5. Step 5: Solve for x
    x = 330,280,462.92/20,889.42
  6. Step 6: Final answer
    x = 15,810.90

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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.