Home / 11,315.58-15,615.54-6,279.90

Finding the Fourth Proportional to 11,315.58, 15,615.54 and 6,279.90

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Solution

The fourth proportional to 11,315.58, 15,615.54 and 6,279.90 is: 8,666.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,315.58 : 15,615.54 = 6,279.90 : x
  2. Step 2: Convert to fraction form
    11,315.58/15,615.54 = 6,279.90/x
  3. Step 3: Cross multiply
    11,315.58x = 15,615.54 × 6,279.90
  4. Step 4: Simplify right side
    11,315.58x = 98,064,029.65
  5. Step 5: Solve for x
    x = 98,064,029.65/11,315.58
  6. Step 6: Final answer
    x = 8,666.28

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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.