Home / 21,828.86-30,124.84-12,876.74

Finding the Fourth Proportional to 21,828.86, 30,124.84 and 12,876.74

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Solution

The fourth proportional to 21,828.86, 30,124.84 and 12,876.74 is: 17,770.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,828.86 : 30,124.84 = 12,876.74 : x
  2. Step 2: Convert to fraction form
    21,828.86/30,124.84 = 12,876.74/x
  3. Step 3: Cross multiply
    21,828.86x = 30,124.84 × 12,876.74
  4. Step 4: Simplify right side
    21,828.86x = 387,909,732.22
  5. Step 5: Solve for x
    x = 387,909,732.22/21,828.86
  6. Step 6: Final answer
    x = 17,770.50

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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.