Home / 11,315.56-15,615.01-6,279.99

Finding the Fourth Proportional to 11,315.56, 15,615.01 and 6,279.99

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Solution

The fourth proportional to 11,315.56, 15,615.01 and 6,279.99 is: 8,666.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,315.56 : 15,615.01 = 6,279.99 : x
  2. Step 2: Convert to fraction form
    11,315.56/15,615.01 = 6,279.99/x
  3. Step 3: Cross multiply
    11,315.56x = 15,615.01 × 6,279.99
  4. Step 4: Simplify right side
    11,315.56x = 98,062,106.65
  5. Step 5: Solve for x
    x = 98,062,106.65/11,315.56
  6. Step 6: Final answer
    x = 8,666.13

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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.