Home / 15,779.07-21,774.83-8,705.34

Finding the Fourth Proportional to 15,779.07, 21,774.83 and 8,705.34

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Solution

The fourth proportional to 15,779.07, 21,774.83 and 8,705.34 is: 12,013.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,779.07 : 21,774.83 = 8,705.34 : x
  2. Step 2: Convert to fraction form
    15,779.07/21,774.83 = 8,705.34/x
  3. Step 3: Cross multiply
    15,779.07x = 21,774.83 × 8,705.34
  4. Step 4: Simplify right side
    15,779.07x = 189,557,255.07
  5. Step 5: Solve for x
    x = 189,557,255.07/15,779.07
  6. Step 6: Final answer
    x = 12,013.21

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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.