Home / 15,589.13-21,513.13-8,515.55

Finding the Fourth Proportional to 15,589.13, 21,513.13 and 8,515.55

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Solution

The fourth proportional to 15,589.13, 21,513.13 and 8,515.55 is: 11,751.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,589.13 : 21,513.13 = 8,515.55 : x
  2. Step 2: Convert to fraction form
    15,589.13/21,513.13 = 8,515.55/x
  3. Step 3: Cross multiply
    15,589.13x = 21,513.13 × 8,515.55
  4. Step 4: Simplify right side
    15,589.13x = 183,196,045.65
  5. Step 5: Solve for x
    x = 183,196,045.65/15,589.13
  6. Step 6: Final answer
    x = 11,751.53

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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.