Home / 21,747.07-30,009.95-12,315.70

Finding the Fourth Proportional to 21,747.07, 30,009.95 and 12,315.70

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Solution

The fourth proportional to 21,747.07, 30,009.95 and 12,315.70 is: 16,995.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,747.07 : 30,009.95 = 12,315.70 : x
  2. Step 2: Convert to fraction form
    21,747.07/30,009.95 = 12,315.70/x
  3. Step 3: Cross multiply
    21,747.07x = 30,009.95 × 12,315.70
  4. Step 4: Simplify right side
    21,747.07x = 369,593,450.80
  5. Step 5: Solve for x
    x = 369,593,450.80/21,747.07
  6. Step 6: Final answer
    x = 16,995.09

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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.