Home / 13,136.58-18,128.48-7,471.31

Finding the Fourth Proportional to 13,136.58, 18,128.48 and 7,471.31

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Solution

The fourth proportional to 13,136.58, 18,128.48 and 7,471.31 is: 10,310.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,136.58 : 18,128.48 = 7,471.31 : x
  2. Step 2: Convert to fraction form
    13,136.58/18,128.48 = 7,471.31/x
  3. Step 3: Cross multiply
    13,136.58x = 18,128.48 × 7,471.31
  4. Step 4: Simplify right side
    13,136.58x = 135,443,365.91
  5. Step 5: Solve for x
    x = 135,443,365.91/13,136.58
  6. Step 6: Final answer
    x = 10,310.40

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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.