Home / 31,618.40-43,653.74-20,292.78

Finding the Fourth Proportional to 31,618.40, 43,653.74 and 20,292.78

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Solution

The fourth proportional to 31,618.40, 43,653.74 and 20,292.78 is: 28,017.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,618.40 : 43,653.74 = 20,292.78 : x
  2. Step 2: Convert to fraction form
    31,618.40/43,653.74 = 20,292.78/x
  3. Step 3: Cross multiply
    31,618.40x = 43,653.74 × 20,292.78
  4. Step 4: Simplify right side
    31,618.40x = 885,855,742.00
  5. Step 5: Solve for x
    x = 885,855,742.00/31,618.40
  6. Step 6: Final answer
    x = 28,017.10

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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.