Home / 5,424.28-8,136.36-1,320.28

Finding the Fourth Proportional to 5,424.28, 8,136.36 and 1,320.28

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Solution

The fourth proportional to 5,424.28, 8,136.36 and 1,320.28 is: 1,980.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,424.28 : 8,136.36 = 1,320.28 : x
  2. Step 2: Convert to fraction form
    5,424.28/8,136.36 = 1,320.28/x
  3. Step 3: Cross multiply
    5,424.28x = 8,136.36 × 1,320.28
  4. Step 4: Simplify right side
    5,424.28x = 10,742,273.38
  5. Step 5: Solve for x
    x = 10,742,273.38/5,424.28
  6. Step 6: Final answer
    x = 1,980.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.