Home / 12,155.15-16,779.70-7,118.67

Finding the Fourth Proportional to 12,155.15, 16,779.70 and 7,118.67

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Solution

The fourth proportional to 12,155.15, 16,779.70 and 7,118.67 is: 9,827.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,155.15 : 16,779.70 = 7,118.67 : x
  2. Step 2: Convert to fraction form
    12,155.15/16,779.70 = 7,118.67/x
  3. Step 3: Cross multiply
    12,155.15x = 16,779.70 × 7,118.67
  4. Step 4: Simplify right side
    12,155.15x = 119,449,063.10
  5. Step 5: Solve for x
    x = 119,449,063.10/12,155.15
  6. Step 6: Final answer
    x = 9,827.04

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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.