Home / 21,043.16-31,486.78-16,870.55

Finding the Fourth Proportional to 21,043.16, 31,486.78 and 16,870.55

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Solution

The fourth proportional to 21,043.16, 31,486.78 and 16,870.55 is: 25,243.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,043.16 : 31,486.78 = 16,870.55 : x
  2. Step 2: Convert to fraction form
    21,043.16/31,486.78 = 16,870.55/x
  3. Step 3: Cross multiply
    21,043.16x = 31,486.78 × 16,870.55
  4. Step 4: Simplify right side
    21,043.16x = 531,199,065.09
  5. Step 5: Solve for x
    x = 531,199,065.09/21,043.16
  6. Step 6: Final answer
    x = 25,243.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.