Home / 21,868.80-32,819.40-8,730.60

Finding the Fourth Proportional to 21,868.80, 32,819.40 and 8,730.60

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Solution

The fourth proportional to 21,868.80, 32,819.40 and 8,730.60 is: 13,102.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,868.80 : 32,819.40 = 8,730.60 : x
  2. Step 2: Convert to fraction form
    21,868.80/32,819.40 = 8,730.60/x
  3. Step 3: Cross multiply
    21,868.80x = 32,819.40 × 8,730.60
  4. Step 4: Simplify right side
    21,868.80x = 286,533,053.64
  5. Step 5: Solve for x
    x = 286,533,053.64/21,868.80
  6. Step 6: Final answer
    x = 13,102.37

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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.