Home / 20,866.56-28,779.09-18,343.30

Finding the Fourth Proportional to 20,866.56, 28,779.09 and 18,343.30

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Solution

The fourth proportional to 20,866.56, 28,779.09 and 18,343.30 is: 25,299.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,866.56 : 28,779.09 = 18,343.30 : x
  2. Step 2: Convert to fraction form
    20,866.56/28,779.09 = 18,343.30/x
  3. Step 3: Cross multiply
    20,866.56x = 28,779.09 × 18,343.30
  4. Step 4: Simplify right side
    20,866.56x = 527,903,481.60
  5. Step 5: Solve for x
    x = 527,903,481.60/20,866.56
  6. Step 6: Final answer
    x = 25,299.02

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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.