Home / 15,303.85-21,121.43-8,589.88

Finding the Fourth Proportional to 15,303.85, 21,121.43 and 8,589.88

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Solution

The fourth proportional to 15,303.85, 21,121.43 and 8,589.88 is: 11,855.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,303.85 : 21,121.43 = 8,589.88 : x
  2. Step 2: Convert to fraction form
    15,303.85/21,121.43 = 8,589.88/x
  3. Step 3: Cross multiply
    15,303.85x = 21,121.43 × 8,589.88
  4. Step 4: Simplify right side
    15,303.85x = 181,430,549.13
  5. Step 5: Solve for x
    x = 181,430,549.13/15,303.85
  6. Step 6: Final answer
    x = 11,855.22

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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.