Home / 13,089.90-19,650.87-8,651.40

Finding the Fourth Proportional to 13,089.90, 19,650.87 and 8,651.40

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Solution

The fourth proportional to 13,089.90, 19,650.87 and 8,651.40 is: 12,987.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,089.90 : 19,650.87 = 8,651.40 : x
  2. Step 2: Convert to fraction form
    13,089.90/19,650.87 = 8,651.40/x
  3. Step 3: Cross multiply
    13,089.90x = 19,650.87 × 8,651.40
  4. Step 4: Simplify right side
    13,089.90x = 170,007,536.72
  5. Step 5: Solve for x
    x = 170,007,536.72/13,089.90
  6. Step 6: Final answer
    x = 12,987.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.