Home / 8,685.39-11,985.69-4,706.40

Finding the Fourth Proportional to 8,685.39, 11,985.69 and 4,706.40

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Solution

The fourth proportional to 8,685.39, 11,985.69 and 4,706.40 is: 6,494.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,685.39 : 11,985.69 = 4,706.40 : x
  2. Step 2: Convert to fraction form
    8,685.39/11,985.69 = 4,706.40/x
  3. Step 3: Cross multiply
    8,685.39x = 11,985.69 × 4,706.40
  4. Step 4: Simplify right side
    8,685.39x = 56,409,451.42
  5. Step 5: Solve for x
    x = 56,409,451.42/8,685.39
  6. Step 6: Final answer
    x = 6,494.75

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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.