Home / 21,897.80-30,215.93-12,336.09

Finding the Fourth Proportional to 21,897.80, 30,215.93 and 12,336.09

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Solution

The fourth proportional to 21,897.80, 30,215.93 and 12,336.09 is: 17,022.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,897.80 : 30,215.93 = 12,336.09 : x
  2. Step 2: Convert to fraction form
    21,897.80/30,215.93 = 12,336.09/x
  3. Step 3: Cross multiply
    21,897.80x = 30,215.93 × 12,336.09
  4. Step 4: Simplify right side
    21,897.80x = 372,746,431.91
  5. Step 5: Solve for x
    x = 372,746,431.91/21,897.80
  6. Step 6: Final answer
    x = 17,022.10

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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.