Home / 12,888.12-17,779.26-8,113.80

Finding the Fourth Proportional to 12,888.12, 17,779.26 and 8,113.80

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Solution

The fourth proportional to 12,888.12, 17,779.26 and 8,113.80 is: 11,193.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,888.12 : 17,779.26 = 8,113.80 : x
  2. Step 2: Convert to fraction form
    12,888.12/17,779.26 = 8,113.80/x
  3. Step 3: Cross multiply
    12,888.12x = 17,779.26 × 8,113.80
  4. Step 4: Simplify right side
    12,888.12x = 144,257,359.79
  5. Step 5: Solve for x
    x = 144,257,359.79/12,888.12
  6. Step 6: Final answer
    x = 11,193.05

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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.