Home / 21,020.19-28,991.45-13,467.22

Finding the Fourth Proportional to 21,020.19, 28,991.45 and 13,467.22

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Solution

The fourth proportional to 21,020.19, 28,991.45 and 13,467.22 is: 18,574.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,020.19 : 28,991.45 = 13,467.22 : x
  2. Step 2: Convert to fraction form
    21,020.19/28,991.45 = 13,467.22/x
  3. Step 3: Cross multiply
    21,020.19x = 28,991.45 × 13,467.22
  4. Step 4: Simplify right side
    21,020.19x = 390,434,201.60
  5. Step 5: Solve for x
    x = 390,434,201.60/21,020.19
  6. Step 6: Final answer
    x = 18,574.25

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Double scale
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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.