Home / 21,828.06-30,120.93-12,398.04

Finding the Fourth Proportional to 21,828.06, 30,120.93 and 12,398.04

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Solution

The fourth proportional to 21,828.06, 30,120.93 and 12,398.04 is: 17,108.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,828.06 : 30,120.93 = 12,398.04 : x
  2. Step 2: Convert to fraction form
    21,828.06/30,120.93 = 12,398.04/x
  3. Step 3: Cross multiply
    21,828.06x = 30,120.93 × 12,398.04
  4. Step 4: Simplify right side
    21,828.06x = 373,440,494.98
  5. Step 5: Solve for x
    x = 373,440,494.98/21,828.06
  6. Step 6: Final answer
    x = 17,108.28

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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.