Home / 11,687.61-16,128.50-6,651.45

Finding the Fourth Proportional to 11,687.61, 16,128.50 and 6,651.45

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Solution

The fourth proportional to 11,687.61, 16,128.50 and 6,651.45 is: 9,178.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,687.61 : 16,128.50 = 6,651.45 : x
  2. Step 2: Convert to fraction form
    11,687.61/16,128.50 = 6,651.45/x
  3. Step 3: Cross multiply
    11,687.61x = 16,128.50 × 6,651.45
  4. Step 4: Simplify right side
    11,687.61x = 107,277,878.07
  5. Step 5: Solve for x
    x = 107,277,878.07/11,687.61
  6. Step 6: Final answer
    x = 9,178.77

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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.