Home / 15,779.15-21,774.23-8,705.62

Finding the Fourth Proportional to 15,779.15, 21,774.23 and 8,705.62

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Solution

The fourth proportional to 15,779.15, 21,774.23 and 8,705.62 is: 12,013.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,779.15 : 21,774.23 = 8,705.62 : x
  2. Step 2: Convert to fraction form
    15,779.15/21,774.23 = 8,705.62/x
  3. Step 3: Cross multiply
    15,779.15x = 21,774.23 × 8,705.62
  4. Step 4: Simplify right side
    15,779.15x = 189,558,063.30
  5. Step 5: Solve for x
    x = 189,558,063.30/15,779.15
  6. Step 6: Final answer
    x = 12,013.20

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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.