Home / 21,045.42-31,579.74-8,574.12

Finding the Fourth Proportional to 21,045.42, 31,579.74 and 8,574.12

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Solution

The fourth proportional to 21,045.42, 31,579.74 and 8,574.12 is: 12,865.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,045.42 : 31,579.74 = 8,574.12 : x
  2. Step 2: Convert to fraction form
    21,045.42/31,579.74 = 8,574.12/x
  3. Step 3: Cross multiply
    21,045.42x = 31,579.74 × 8,574.12
  4. Step 4: Simplify right side
    21,045.42x = 270,768,480.33
  5. Step 5: Solve for x
    x = 270,768,480.33/21,045.42
  6. Step 6: Final answer
    x = 12,865.91

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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.