Home / 14,178.78-19,567.14-8,129.90

Finding the Fourth Proportional to 14,178.78, 19,567.14 and 8,129.90

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Solution

The fourth proportional to 14,178.78, 19,567.14 and 8,129.90 is: 11,219.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,178.78 : 19,567.14 = 8,129.90 : x
  2. Step 2: Convert to fraction form
    14,178.78/19,567.14 = 8,129.90/x
  3. Step 3: Cross multiply
    14,178.78x = 19,567.14 × 8,129.90
  4. Step 4: Simplify right side
    14,178.78x = 159,078,909.92
  5. Step 5: Solve for x
    x = 159,078,909.92/14,178.78
  6. Step 6: Final answer
    x = 11,219.51

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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.