Home / 20,876.19-28,814.58-12,913.77

Finding the Fourth Proportional to 20,876.19, 28,814.58 and 12,913.77

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Solution

The fourth proportional to 20,876.19, 28,814.58 and 12,913.77 is: 17,824.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.19 : 28,814.58 = 12,913.77 : x
  2. Step 2: Convert to fraction form
    20,876.19/28,814.58 = 12,913.77/x
  3. Step 3: Cross multiply
    20,876.19x = 28,814.58 × 12,913.77
  4. Step 4: Simplify right side
    20,876.19x = 372,104,858.77
  5. Step 5: Solve for x
    x = 372,104,858.77/20,876.19
  6. Step 6: Final answer
    x = 17,824.37

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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.