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Finding the Fourth Proportional to 8,718.69, 12,036.74 and 6,670.74

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Solution

The fourth proportional to 8,718.69, 12,036.74 and 6,670.74 is: 9,209.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718.69 : 12,036.74 = 6,670.74 : x
  2. Step 2: Convert to fraction form
    8,718.69/12,036.74 = 6,670.74/x
  3. Step 3: Cross multiply
    8,718.69x = 12,036.74 × 6,670.74
  4. Step 4: Simplify right side
    8,718.69x = 80,293,959.73
  5. Step 5: Solve for x
    x = 80,293,959.73/8,718.69
  6. Step 6: Final answer
    x = 9,209.40

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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.