Home / 12,911.10-19,342.35-6,649.80

Finding the Fourth Proportional to 12,911.10, 19,342.35 and 6,649.80

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Solution

The fourth proportional to 12,911.10, 19,342.35 and 6,649.80 is: 9,962.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,911.10 : 19,342.35 = 6,649.80 : x
  2. Step 2: Convert to fraction form
    12,911.10/19,342.35 = 6,649.80/x
  3. Step 3: Cross multiply
    12,911.10x = 19,342.35 × 6,649.80
  4. Step 4: Simplify right side
    12,911.10x = 128,622,759.03
  5. Step 5: Solve for x
    x = 128,622,759.03/12,911.10
  6. Step 6: Final answer
    x = 9,962.18

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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.