Home / 13,136.50-18,128.37-9,782.20

Finding the Fourth Proportional to 13,136.50, 18,128.37 and 9,782.20

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Solution

The fourth proportional to 13,136.50, 18,128.37 and 9,782.20 is: 13,499.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,136.50 : 18,128.37 = 9,782.20 : x
  2. Step 2: Convert to fraction form
    13,136.50/18,128.37 = 9,782.20/x
  3. Step 3: Cross multiply
    13,136.50x = 18,128.37 × 9,782.20
  4. Step 4: Simplify right side
    13,136.50x = 177,335,341.01
  5. Step 5: Solve for x
    x = 177,335,341.01/13,136.50
  6. Step 6: Final answer
    x = 13,499.44

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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.