Home / 21,106.08-31,515.84-18,889.92

Finding the Fourth Proportional to 21,106.08, 31,515.84 and 18,889.92

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Solution

The fourth proportional to 21,106.08, 31,515.84 and 18,889.92 is: 28,206.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,106.08 : 31,515.84 = 18,889.92 : x
  2. Step 2: Convert to fraction form
    21,106.08/31,515.84 = 18,889.92/x
  3. Step 3: Cross multiply
    21,106.08x = 31,515.84 × 18,889.92
  4. Step 4: Simplify right side
    21,106.08x = 595,331,696.33
  5. Step 5: Solve for x
    x = 595,331,696.33/21,106.08
  6. Step 6: Final answer
    x = 28,206.64

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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.