Home / 11,109.10-16,670.85-6,429.10

Finding the Fourth Proportional to 11,109.10, 16,670.85 and 6,429.10

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Solution

The fourth proportional to 11,109.10, 16,670.85 and 6,429.10 is: 9,647.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,109.10 : 16,670.85 = 6,429.10 : x
  2. Step 2: Convert to fraction form
    11,109.10/16,670.85 = 6,429.10/x
  3. Step 3: Cross multiply
    11,109.10x = 16,670.85 × 6,429.10
  4. Step 4: Simplify right side
    11,109.10x = 107,178,561.74
  5. Step 5: Solve for x
    x = 107,178,561.74/11,109.10
  6. Step 6: Final answer
    x = 9,647.82

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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.