Home / 21,087.12-31,466.94-18,287.76

Finding the Fourth Proportional to 21,087.12, 31,466.94 and 18,287.76

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Solution

The fourth proportional to 21,087.12, 31,466.94 and 18,287.76 is: 27,289.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,087.12 : 31,466.94 = 18,287.76 : x
  2. Step 2: Convert to fraction form
    21,087.12/31,466.94 = 18,287.76/x
  3. Step 3: Cross multiply
    21,087.12x = 31,466.94 × 18,287.76
  4. Step 4: Simplify right side
    21,087.12x = 575,459,846.65
  5. Step 5: Solve for x
    x = 575,459,846.65/21,087.12
  6. Step 6: Final answer
    x = 27,289.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.