Home / 28,871.51-43,300.74-9,139.31

Finding the Fourth Proportional to 28,871.51, 43,300.74 and 9,139.31

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Solution

The fourth proportional to 28,871.51, 43,300.74 and 9,139.31 is: 13,706.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,871.51 : 43,300.74 = 9,139.31 : x
  2. Step 2: Convert to fraction form
    28,871.51/43,300.74 = 9,139.31/x
  3. Step 3: Cross multiply
    28,871.51x = 43,300.74 × 9,139.31
  4. Step 4: Simplify right side
    28,871.51x = 395,738,759.34
  5. Step 5: Solve for x
    x = 395,738,759.34/28,871.51
  6. Step 6: Final answer
    x = 13,706.89

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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.