Home / 20,953.50-28,916.64-11,521.86

Finding the Fourth Proportional to 20,953.50, 28,916.64 and 11,521.86

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Solution

The fourth proportional to 20,953.50, 28,916.64 and 11,521.86 is: 15,900.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,953.50 : 28,916.64 = 11,521.86 : x
  2. Step 2: Convert to fraction form
    20,953.50/28,916.64 = 11,521.86/x
  3. Step 3: Cross multiply
    20,953.50x = 28,916.64 × 11,521.86
  4. Step 4: Simplify right side
    20,953.50x = 333,173,477.75
  5. Step 5: Solve for x
    x = 333,173,477.75/20,953.50
  6. Step 6: Final answer
    x = 15,900.61

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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.