Home / 28,354.25-39,128.87-15,779.01

Finding the Fourth Proportional to 28,354.25, 39,128.87 and 15,779.01

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Solution

The fourth proportional to 28,354.25, 39,128.87 and 15,779.01 is: 21,775.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,354.25 : 39,128.87 = 15,779.01 : x
  2. Step 2: Convert to fraction form
    28,354.25/39,128.87 = 15,779.01/x
  3. Step 3: Cross multiply
    28,354.25x = 39,128.87 × 15,779.01
  4. Step 4: Simplify right side
    28,354.25x = 617,414,752.12
  5. Step 5: Solve for x
    x = 617,414,752.12/28,354.25
  6. Step 6: Final answer
    x = 21,775.03

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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.