Home / 8,688.82-11,988.54-4,911.78

Finding the Fourth Proportional to 8,688.82, 11,988.54 and 4,911.78

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Solution

The fourth proportional to 8,688.82, 11,988.54 and 4,911.78 is: 6,777.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.82 : 11,988.54 = 4,911.78 : x
  2. Step 2: Convert to fraction form
    8,688.82/11,988.54 = 4,911.78/x
  3. Step 3: Cross multiply
    8,688.82x = 11,988.54 × 4,911.78
  4. Step 4: Simplify right side
    8,688.82x = 58,885,071.00
  5. Step 5: Solve for x
    x = 58,885,071.00/8,688.82
  6. Step 6: Final answer
    x = 6,777.11

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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.