Home / 21,864.12-30,172.23-12,303.97

Finding the Fourth Proportional to 21,864.12, 30,172.23 and 12,303.97

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Solution

The fourth proportional to 21,864.12, 30,172.23 and 12,303.97 is: 16,979.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,864.12 : 30,172.23 = 12,303.97 : x
  2. Step 2: Convert to fraction form
    21,864.12/30,172.23 = 12,303.97/x
  3. Step 3: Cross multiply
    21,864.12x = 30,172.23 × 12,303.97
  4. Step 4: Simplify right side
    21,864.12x = 371,238,137.32
  5. Step 5: Solve for x
    x = 371,238,137.32/21,864.12
  6. Step 6: Final answer
    x = 16,979.33

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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.