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Finding the Fourth Proportional to 8,718.69, 12,019.48 and 6,199.86

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Solution

The fourth proportional to 8,718.69, 12,019.48 and 6,199.86 is: 8,547.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718.69 : 12,019.48 = 6,199.86 : x
  2. Step 2: Convert to fraction form
    8,718.69/12,019.48 = 6,199.86/x
  3. Step 3: Cross multiply
    8,718.69x = 12,019.48 × 6,199.86
  4. Step 4: Simplify right side
    8,718.69x = 74,519,093.27
  5. Step 5: Solve for x
    x = 74,519,093.27/8,718.69
  6. Step 6: Final answer
    x = 8,547.05

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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.