Home / 21,518.55-29,698.38-12,087.12

Finding the Fourth Proportional to 21,518.55, 29,698.38 and 12,087.12

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Solution

The fourth proportional to 21,518.55, 29,698.38 and 12,087.12 is: 16,681.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,518.55 : 29,698.38 = 12,087.12 : x
  2. Step 2: Convert to fraction form
    21,518.55/29,698.38 = 12,087.12/x
  3. Step 3: Cross multiply
    21,518.55x = 29,698.38 × 12,087.12
  4. Step 4: Simplify right side
    21,518.55x = 358,967,882.87
  5. Step 5: Solve for x
    x = 358,967,882.87/21,518.55
  6. Step 6: Final answer
    x = 16,681.79

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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.