Home / 21,053.60-31,564.20-11,819.60

Finding the Fourth Proportional to 21,053.60, 31,564.20 and 11,819.60

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Solution

The fourth proportional to 21,053.60, 31,564.20 and 11,819.60 is: 17,720.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,053.60 : 31,564.20 = 11,819.60 : x
  2. Step 2: Convert to fraction form
    21,053.60/31,564.20 = 11,819.60/x
  3. Step 3: Cross multiply
    21,053.60x = 31,564.20 × 11,819.60
  4. Step 4: Simplify right side
    21,053.60x = 373,076,218.32
  5. Step 5: Solve for x
    x = 373,076,218.32/21,053.60
  6. Step 6: Final answer
    x = 17,720.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.