Home / 18,905.27-28,321-13,898.41

Finding the Fourth Proportional to 18,905.27, 28,321 and 13,898.41

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Solution

The fourth proportional to 18,905.27, 28,321 and 13,898.41 is: 20,820.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,905.27 : 28,321 = 13,898.41 : x
  2. Step 2: Convert to fraction form
    18,905.27/28,321 = 13,898.41/x
  3. Step 3: Cross multiply
    18,905.27x = 28,321 × 13,898.41
  4. Step 4: Simplify right side
    18,905.27x = 393,616,869.61
  5. Step 5: Solve for x
    x = 393,616,869.61/18,905.27
  6. Step 6: Final answer
    x = 20,820.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.