Home / 15,779.45-21,774.35-8,705.86

Finding the Fourth Proportional to 15,779.45, 21,774.35 and 8,705.86

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Solution

The fourth proportional to 15,779.45, 21,774.35 and 8,705.86 is: 12,013.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,779.45 : 21,774.35 = 8,705.86 : x
  2. Step 2: Convert to fraction form
    15,779.45/21,774.35 = 8,705.86/x
  3. Step 3: Cross multiply
    15,779.45x = 21,774.35 × 8,705.86
  4. Step 4: Simplify right side
    15,779.45x = 189,564,410.02
  5. Step 5: Solve for x
    x = 189,564,410.02/15,779.45
  6. Step 6: Final answer
    x = 12,013.37

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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.