Home / 15,311.88-21,126.50-9,343.16

Finding the Fourth Proportional to 15,311.88, 21,126.50 and 9,343.16

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Solution

The fourth proportional to 15,311.88, 21,126.50 and 9,343.16 is: 12,891.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,311.88 : 21,126.50 = 9,343.16 : x
  2. Step 2: Convert to fraction form
    15,311.88/21,126.50 = 9,343.16/x
  3. Step 3: Cross multiply
    15,311.88x = 21,126.50 × 9,343.16
  4. Step 4: Simplify right side
    15,311.88x = 197,388,269.74
  5. Step 5: Solve for x
    x = 197,388,269.74/15,311.88
  6. Step 6: Final answer
    x = 12,891.18

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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.