Home / 13,142.28-18,136.08-7,173.93

Finding the Fourth Proportional to 13,142.28, 18,136.08 and 7,173.93

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Solution

The fourth proportional to 13,142.28, 18,136.08 and 7,173.93 is: 9,899.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,142.28 : 18,136.08 = 7,173.93 : x
  2. Step 2: Convert to fraction form
    13,142.28/18,136.08 = 7,173.93/x
  3. Step 3: Cross multiply
    13,142.28x = 18,136.08 × 7,173.93
  4. Step 4: Simplify right side
    13,142.28x = 130,106,968.39
  5. Step 5: Solve for x
    x = 130,106,968.39/13,142.28
  6. Step 6: Final answer
    x = 9,899.88

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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.