Home / 14,079.92-21,122.16-5,315.60

Finding the Fourth Proportional to 14,079.92, 21,122.16 and 5,315.60

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Solution

The fourth proportional to 14,079.92, 21,122.16 and 5,315.60 is: 7,974.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,079.92 : 21,122.16 = 5,315.60 : x
  2. Step 2: Convert to fraction form
    14,079.92/21,122.16 = 5,315.60/x
  3. Step 3: Cross multiply
    14,079.92x = 21,122.16 × 5,315.60
  4. Step 4: Simplify right side
    14,079.92x = 112,276,953.70
  5. Step 5: Solve for x
    x = 112,276,953.70/14,079.92
  6. Step 6: Final answer
    x = 7,974.26

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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.