Home / 21,014.10-28,980.32-13,928.22

Finding the Fourth Proportional to 21,014.10, 28,980.32 and 13,928.22

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Solution

The fourth proportional to 21,014.10, 28,980.32 and 13,928.22 is: 19,208.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,014.10 : 28,980.32 = 13,928.22 : x
  2. Step 2: Convert to fraction form
    21,014.10/28,980.32 = 13,928.22/x
  3. Step 3: Cross multiply
    21,014.10x = 28,980.32 × 13,928.22
  4. Step 4: Simplify right side
    21,014.10x = 403,644,202.99
  5. Step 5: Solve for x
    x = 403,644,202.99/21,014.10
  6. Step 6: Final answer
    x = 19,208.26

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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.