Home / 15,779.23-21,775.59-8,705.65

Finding the Fourth Proportional to 15,779.23, 21,775.59 and 8,705.65

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Solution

The fourth proportional to 15,779.23, 21,775.59 and 8,705.65 is: 12,013.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,779.23 : 21,775.59 = 8,705.65 : x
  2. Step 2: Convert to fraction form
    15,779.23/21,775.59 = 8,705.65/x
  3. Step 3: Cross multiply
    15,779.23x = 21,775.59 × 8,705.65
  4. Step 4: Simplify right side
    15,779.23x = 189,570,665.08
  5. Step 5: Solve for x
    x = 189,570,665.08/15,779.23
  6. Step 6: Final answer
    x = 12,013.94

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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.