Home / 21,859.71-30,165.75-12,300.13

Finding the Fourth Proportional to 21,859.71, 30,165.75 and 12,300.13

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Solution

The fourth proportional to 21,859.71, 30,165.75 and 12,300.13 is: 16,973.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,859.71 : 30,165.75 = 12,300.13 : x
  2. Step 2: Convert to fraction form
    21,859.71/30,165.75 = 12,300.13/x
  3. Step 3: Cross multiply
    21,859.71x = 30,165.75 × 12,300.13
  4. Step 4: Simplify right side
    21,859.71x = 371,042,585.05
  5. Step 5: Solve for x
    x = 371,042,585.05/21,859.71
  6. Step 6: Final answer
    x = 16,973.81

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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.