Home / 15,678.40-21,636.22-8,604.86

Finding the Fourth Proportional to 15,678.40, 21,636.22 and 8,604.86

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Solution

The fourth proportional to 15,678.40, 21,636.22 and 8,604.86 is: 11,874.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,678.40 : 21,636.22 = 8,604.86 : x
  2. Step 2: Convert to fraction form
    15,678.40/21,636.22 = 8,604.86/x
  3. Step 3: Cross multiply
    15,678.40x = 21,636.22 × 8,604.86
  4. Step 4: Simplify right side
    15,678.40x = 186,176,644.03
  5. Step 5: Solve for x
    x = 186,176,644.03/15,678.40
  6. Step 6: Final answer
    x = 11,874.72

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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.