Home / 13,178.63-18,179.65-8,929.91

Finding the Fourth Proportional to 13,178.63, 18,179.65 and 8,929.91

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Solution

The fourth proportional to 13,178.63, 18,179.65 and 8,929.91 is: 12,318.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,178.63 : 18,179.65 = 8,929.91 : x
  2. Step 2: Convert to fraction form
    13,178.63/18,179.65 = 8,929.91/x
  3. Step 3: Cross multiply
    13,178.63x = 18,179.65 × 8,929.91
  4. Step 4: Simplify right side
    13,178.63x = 162,342,638.33
  5. Step 5: Solve for x
    x = 162,342,638.33/13,178.63
  6. Step 6: Final answer
    x = 12,318.63

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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.