Home / 12,868.89-19,287.93-6,631.89

Finding the Fourth Proportional to 12,868.89, 19,287.93 and 6,631.89

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Solution

The fourth proportional to 12,868.89, 19,287.93 and 6,631.89 is: 9,939.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,868.89 : 19,287.93 = 6,631.89 : x
  2. Step 2: Convert to fraction form
    12,868.89/19,287.93 = 6,631.89/x
  3. Step 3: Cross multiply
    12,868.89x = 19,287.93 × 6,631.89
  4. Step 4: Simplify right side
    12,868.89x = 127,915,430.09
  5. Step 5: Solve for x
    x = 127,915,430.09/12,868.89
  6. Step 6: Final answer
    x = 9,939.90

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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.