Home / 21,970.75-30,319.63-11,899.23

Finding the Fourth Proportional to 21,970.75, 30,319.63 and 11,899.23

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Solution

The fourth proportional to 21,970.75, 30,319.63 and 11,899.23 is: 16,420.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,970.75 : 30,319.63 = 11,899.23 : x
  2. Step 2: Convert to fraction form
    21,970.75/30,319.63 = 11,899.23/x
  3. Step 3: Cross multiply
    21,970.75x = 30,319.63 × 11,899.23
  4. Step 4: Simplify right side
    21,970.75x = 360,780,174.37
  5. Step 5: Solve for x
    x = 360,780,174.37/21,970.75
  6. Step 6: Final answer
    x = 16,420.93

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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.