Home / 13,418.70-18,520.43-8,570.31

Finding the Fourth Proportional to 13,418.70, 18,520.43 and 8,570.31

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Solution

The fourth proportional to 13,418.70, 18,520.43 and 8,570.31 is: 11,828.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,418.70 : 18,520.43 = 8,570.31 : x
  2. Step 2: Convert to fraction form
    13,418.70/18,520.43 = 8,570.31/x
  3. Step 3: Cross multiply
    13,418.70x = 18,520.43 × 8,570.31
  4. Step 4: Simplify right side
    13,418.70x = 158,725,783.58
  5. Step 5: Solve for x
    x = 158,725,783.58/13,418.70
  6. Step 6: Final answer
    x = 11,828.70

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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.