Home / 28,100.80-38,779.04-15,354.07

Finding the Fourth Proportional to 28,100.80, 38,779.04 and 15,354.07

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Solution

The fourth proportional to 28,100.80, 38,779.04 and 15,354.07 is: 21,188.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,100.80 : 38,779.04 = 15,354.07 : x
  2. Step 2: Convert to fraction form
    28,100.80/38,779.04 = 15,354.07/x
  3. Step 3: Cross multiply
    28,100.80x = 38,779.04 × 15,354.07
  4. Step 4: Simplify right side
    28,100.80x = 595,416,216.20
  5. Step 5: Solve for x
    x = 595,416,216.20/28,100.80
  6. Step 6: Final answer
    x = 21,188.59

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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.