Home / 21,789.08-30,068.34-12,357.44

Finding the Fourth Proportional to 21,789.08, 30,068.34 and 12,357.44

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Solution

The fourth proportional to 21,789.08, 30,068.34 and 12,357.44 is: 17,052.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,789.08 : 30,068.34 = 12,357.44 : x
  2. Step 2: Convert to fraction form
    21,789.08/30,068.34 = 12,357.44/x
  3. Step 3: Cross multiply
    21,789.08x = 30,068.34 × 12,357.44
  4. Step 4: Simplify right side
    21,789.08x = 371,567,707.45
  5. Step 5: Solve for x
    x = 371,567,707.45/21,789.08
  6. Step 6: Final answer
    x = 17,052.93

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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.