Home / 28,009.29-42,021.74-12,215.70

Finding the Fourth Proportional to 28,009.29, 42,021.74 and 12,215.70

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Solution

The fourth proportional to 28,009.29, 42,021.74 and 12,215.70 is: 18,326.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,009.29 : 42,021.74 = 12,215.70 : x
  2. Step 2: Convert to fraction form
    28,009.29/42,021.74 = 12,215.70/x
  3. Step 3: Cross multiply
    28,009.29x = 42,021.74 × 12,215.70
  4. Step 4: Simplify right side
    28,009.29x = 513,324,908.24
  5. Step 5: Solve for x
    x = 513,324,908.24/28,009.29
  6. Step 6: Final answer
    x = 18,326.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.