Home / 8,688.01-11,990.08-4,911.49

Finding the Fourth Proportional to 8,688.01, 11,990.08 and 4,911.49

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Solution

The fourth proportional to 8,688.01, 11,990.08 and 4,911.49 is: 6,778.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.01 : 11,990.08 = 4,911.49 : x
  2. Step 2: Convert to fraction form
    8,688.01/11,990.08 = 4,911.49/x
  3. Step 3: Cross multiply
    8,688.01x = 11,990.08 × 4,911.49
  4. Step 4: Simplify right side
    8,688.01x = 58,889,084.07
  5. Step 5: Solve for x
    x = 58,889,084.07/8,688.01
  6. Step 6: Final answer
    x = 6,778.20

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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.