Home / 21,824.90-30,120.81-12,395.06

Finding the Fourth Proportional to 21,824.90, 30,120.81 and 12,395.06

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Solution

The fourth proportional to 21,824.90, 30,120.81 and 12,395.06 is: 17,106.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,824.90 : 30,120.81 = 12,395.06 : x
  2. Step 2: Convert to fraction form
    21,824.90/30,120.81 = 12,395.06/x
  3. Step 3: Cross multiply
    21,824.90x = 30,120.81 × 12,395.06
  4. Step 4: Simplify right side
    21,824.90x = 373,349,247.20
  5. Step 5: Solve for x
    x = 373,349,247.20/21,824.90
  6. Step 6: Final answer
    x = 17,106.57

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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.