Home / 20,370.84-28,110.24-12,411.78

Finding the Fourth Proportional to 20,370.84, 28,110.24 and 12,411.78

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Solution

The fourth proportional to 20,370.84, 28,110.24 and 12,411.78 is: 17,127.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,370.84 : 28,110.24 = 12,411.78 : x
  2. Step 2: Convert to fraction form
    20,370.84/28,110.24 = 12,411.78/x
  3. Step 3: Cross multiply
    20,370.84x = 28,110.24 × 12,411.78
  4. Step 4: Simplify right side
    20,370.84x = 348,898,114.63
  5. Step 5: Solve for x
    x = 348,898,114.63/20,370.84
  6. Step 6: Final answer
    x = 17,127.33

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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.