Home / 21,008.47-28,991.63-11,577.03

Finding the Fourth Proportional to 21,008.47, 28,991.63 and 11,577.03

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Solution

The fourth proportional to 21,008.47, 28,991.63 and 11,577.03 is: 15,976.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.47 : 28,991.63 = 11,577.03 : x
  2. Step 2: Convert to fraction form
    21,008.47/28,991.63 = 11,577.03/x
  3. Step 3: Cross multiply
    21,008.47x = 28,991.63 × 11,577.03
  4. Step 4: Simplify right side
    21,008.47x = 335,636,970.26
  5. Step 5: Solve for x
    x = 335,636,970.26/21,008.47
  6. Step 6: Final answer
    x = 15,976.27

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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.