Home / 11,899.40-16,421.38-6,521.48

Finding the Fourth Proportional to 11,899.40, 16,421.38 and 6,521.48

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Solution

The fourth proportional to 11,899.40, 16,421.38 and 6,521.48 is: 8,999.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,899.40 : 16,421.38 = 6,521.48 : x
  2. Step 2: Convert to fraction form
    11,899.40/16,421.38 = 6,521.48/x
  3. Step 3: Cross multiply
    11,899.40x = 16,421.38 × 6,521.48
  4. Step 4: Simplify right side
    11,899.40x = 107,091,586.53
  5. Step 5: Solve for x
    x = 107,091,586.53/11,899.40
  6. Step 6: Final answer
    x = 8,999.75

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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.