Home / 21,744.81-30,007.95-12,315.21

Finding the Fourth Proportional to 21,744.81, 30,007.95 and 12,315.21

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Solution

The fourth proportional to 21,744.81, 30,007.95 and 12,315.21 is: 16,995.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,744.81 : 30,007.95 = 12,315.21 : x
  2. Step 2: Convert to fraction form
    21,744.81/30,007.95 = 12,315.21/x
  3. Step 3: Cross multiply
    21,744.81x = 30,007.95 × 12,315.21
  4. Step 4: Simplify right side
    21,744.81x = 369,554,205.92
  5. Step 5: Solve for x
    x = 369,554,205.92/21,744.81
  6. Step 6: Final answer
    x = 16,995.05

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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.