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Finding the Fourth Proportional to 12,888.08, 17,779 and 8,038.80

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Solution

The fourth proportional to 12,888.08, 17,779 and 8,038.80 is: 11,089.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,888.08 : 17,779 = 8,038.80 : x
  2. Step 2: Convert to fraction form
    12,888.08/17,779 = 8,038.80/x
  3. Step 3: Cross multiply
    12,888.08x = 17,779 × 8,038.80
  4. Step 4: Simplify right side
    12,888.08x = 142,921,825.20
  5. Step 5: Solve for x
    x = 142,921,825.20/12,888.08
  6. Step 6: Final answer
    x = 11,089.46

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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.