Home / 18,747.83-28,128.85-11,256.63

Finding the Fourth Proportional to 18,747.83, 28,128.85 and 11,256.63

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Solution

The fourth proportional to 18,747.83, 28,128.85 and 11,256.63 is: 16,889.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,747.83 : 28,128.85 = 11,256.63 : x
  2. Step 2: Convert to fraction form
    18,747.83/28,128.85 = 11,256.63/x
  3. Step 3: Cross multiply
    18,747.83x = 28,128.85 × 11,256.63
  4. Step 4: Simplify right side
    18,747.83x = 316,636,056.78
  5. Step 5: Solve for x
    x = 316,636,056.78/18,747.83
  6. Step 6: Final answer
    x = 16,889.21

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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.