Home / 20,365.15-28,100.64-12,409.87

Finding the Fourth Proportional to 20,365.15, 28,100.64 and 12,409.87

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Solution

The fourth proportional to 20,365.15, 28,100.64 and 12,409.87 is: 17,123.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,365.15 : 28,100.64 = 12,409.87 : x
  2. Step 2: Convert to fraction form
    20,365.15/28,100.64 = 12,409.87/x
  3. Step 3: Cross multiply
    20,365.15x = 28,100.64 × 12,409.87
  4. Step 4: Simplify right side
    20,365.15x = 348,725,289.32
  5. Step 5: Solve for x
    x = 348,725,289.32/20,365.15
  6. Step 6: Final answer
    x = 17,123.63

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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.