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Finding the Fourth Proportional to 10,666.77, 15,977.07 and 6,957.75

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Solution

The fourth proportional to 10,666.77, 15,977.07 and 6,957.75 is: 10,421.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,666.77 : 15,977.07 = 6,957.75 : x
  2. Step 2: Convert to fraction form
    10,666.77/15,977.07 = 6,957.75/x
  3. Step 3: Cross multiply
    10,666.77x = 15,977.07 × 6,957.75
  4. Step 4: Simplify right side
    10,666.77x = 111,164,361.51
  5. Step 5: Solve for x
    x = 111,164,361.51/10,666.77
  6. Step 6: Final answer
    x = 10,421.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.