Home / 15,577.04-21,490.44-9,991.28

Finding the Fourth Proportional to 15,577.04, 21,490.44 and 9,991.28

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Solution

The fourth proportional to 15,577.04, 21,490.44 and 9,991.28 is: 13,784.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,577.04 : 21,490.44 = 9,991.28 : x
  2. Step 2: Convert to fraction form
    15,577.04/21,490.44 = 9,991.28/x
  3. Step 3: Cross multiply
    15,577.04x = 21,490.44 × 9,991.28
  4. Step 4: Simplify right side
    15,577.04x = 214,717,003.36
  5. Step 5: Solve for x
    x = 214,717,003.36/15,577.04
  6. Step 6: Final answer
    x = 13,784.20

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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.