Home / 28,079.36-42,120.84-11,430.32

Finding the Fourth Proportional to 28,079.36, 42,120.84 and 11,430.32

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Solution

The fourth proportional to 28,079.36, 42,120.84 and 11,430.32 is: 17,146.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,079.36 : 42,120.84 = 11,430.32 : x
  2. Step 2: Convert to fraction form
    28,079.36/42,120.84 = 11,430.32/x
  3. Step 3: Cross multiply
    28,079.36x = 42,120.84 × 11,430.32
  4. Step 4: Simplify right side
    28,079.36x = 481,454,679.87
  5. Step 5: Solve for x
    x = 481,454,679.87/28,079.36
  6. Step 6: Final answer
    x = 17,146.21

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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.