Home / 28,525.89-39,367.11-15,779.02

Finding the Fourth Proportional to 28,525.89, 39,367.11 and 15,779.02

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Solution

The fourth proportional to 28,525.89, 39,367.11 and 15,779.02 is: 21,775.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,525.89 : 39,367.11 = 15,779.02 : x
  2. Step 2: Convert to fraction form
    28,525.89/39,367.11 = 15,779.02/x
  3. Step 3: Cross multiply
    28,525.89x = 39,367.11 × 15,779.02
  4. Step 4: Simplify right side
    28,525.89x = 621,174,317.61
  5. Step 5: Solve for x
    x = 621,174,317.61/28,525.89
  6. Step 6: Final answer
    x = 21,775.81

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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.