Home / 21,805.12-30,081.04-12,848.32

Finding the Fourth Proportional to 21,805.12, 30,081.04 and 12,848.32

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Solution

The fourth proportional to 21,805.12, 30,081.04 and 12,848.32 is: 17,724.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,805.12 : 30,081.04 = 12,848.32 : x
  2. Step 2: Convert to fraction form
    21,805.12/30,081.04 = 12,848.32/x
  3. Step 3: Cross multiply
    21,805.12x = 30,081.04 × 12,848.32
  4. Step 4: Simplify right side
    21,805.12x = 386,490,827.85
  5. Step 5: Solve for x
    x = 386,490,827.85/21,805.12
  6. Step 6: Final answer
    x = 17,724.77

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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.