Home / 21,020.31-28,991.62-13,467.35

Finding the Fourth Proportional to 21,020.31, 28,991.62 and 13,467.35

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Solution

The fourth proportional to 21,020.31, 28,991.62 and 13,467.35 is: 18,574.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,020.31 : 28,991.62 = 13,467.35 : x
  2. Step 2: Convert to fraction form
    21,020.31/28,991.62 = 13,467.35/x
  3. Step 3: Cross multiply
    21,020.31x = 28,991.62 × 13,467.35
  4. Step 4: Simplify right side
    21,020.31x = 390,440,114.98
  5. Step 5: Solve for x
    x = 390,440,114.98/21,020.31
  6. Step 6: Final answer
    x = 18,574.42

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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.