Home / 15,515.16-21,415.76-8,805.26

Finding the Fourth Proportional to 15,515.16, 21,415.76 and 8,805.26

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Solution

The fourth proportional to 15,515.16, 21,415.76 and 8,805.26 is: 12,154.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,515.16 : 21,415.76 = 8,805.26 : x
  2. Step 2: Convert to fraction form
    15,515.16/21,415.76 = 8,805.26/x
  3. Step 3: Cross multiply
    15,515.16x = 21,415.76 × 8,805.26
  4. Step 4: Simplify right side
    15,515.16x = 188,571,183.79
  5. Step 5: Solve for x
    x = 188,571,183.79/15,515.16
  6. Step 6: Final answer
    x = 12,154.00

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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.