Home / 21,870.44-30,180.93-12,310.28

Finding the Fourth Proportional to 21,870.44, 30,180.93 and 12,310.28

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Solution

The fourth proportional to 21,870.44, 30,180.93 and 12,310.28 is: 16,988.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,870.44 : 30,180.93 = 12,310.28 : x
  2. Step 2: Convert to fraction form
    21,870.44/30,180.93 = 12,310.28/x
  3. Step 3: Cross multiply
    21,870.44x = 30,180.93 × 12,310.28
  4. Step 4: Simplify right side
    21,870.44x = 371,535,698.96
  5. Step 5: Solve for x
    x = 371,535,698.96/21,870.44
  6. Step 6: Final answer
    x = 16,988.03

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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.