Home / 13,136.48-18,128.10-7,168.00

Finding the Fourth Proportional to 13,136.48, 18,128.10 and 7,168.00

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Solution

The fourth proportional to 13,136.48, 18,128.10 and 7,168.00 is: 9,891.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,136.48 : 18,128.10 = 7,168.00 : x
  2. Step 2: Convert to fraction form
    13,136.48/18,128.10 = 7,168.00/x
  3. Step 3: Cross multiply
    13,136.48x = 18,128.10 × 7,168.00
  4. Step 4: Simplify right side
    13,136.48x = 129,942,130.16
  5. Step 5: Solve for x
    x = 129,942,130.16/13,136.48
  6. Step 6: Final answer
    x = 9,891.70

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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.