Home / 21,051.98-31,485.02-18,728.36

Finding the Fourth Proportional to 21,051.98, 31,485.02 and 18,728.36

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Solution

The fourth proportional to 21,051.98, 31,485.02 and 18,728.36 is: 28,009.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,051.98 : 31,485.02 = 18,728.36 : x
  2. Step 2: Convert to fraction form
    21,051.98/31,485.02 = 18,728.36/x
  3. Step 3: Cross multiply
    21,051.98x = 31,485.02 × 18,728.36
  4. Step 4: Simplify right side
    21,051.98x = 589,662,538.10
  5. Step 5: Solve for x
    x = 589,662,538.10/21,051.98
  6. Step 6: Final answer
    x = 28,009.84

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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.