Home / 15,779.33-21,775.69-8,705.90

Finding the Fourth Proportional to 15,779.33, 21,775.69 and 8,705.90

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Solution

The fourth proportional to 15,779.33, 21,775.69 and 8,705.90 is: 12,014.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,779.33 : 21,775.69 = 8,705.90 : x
  2. Step 2: Convert to fraction form
    15,779.33/21,775.69 = 8,705.90/x
  3. Step 3: Cross multiply
    15,779.33x = 21,775.69 × 8,705.90
  4. Step 4: Simplify right side
    15,779.33x = 189,576,979.57
  5. Step 5: Solve for x
    x = 189,576,979.57/15,779.33
  6. Step 6: Final answer
    x = 12,014.26

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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.