Home / 31,680.11-43,726.34-18,940.84

Finding the Fourth Proportional to 31,680.11, 43,726.34 and 18,940.84

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Solution

The fourth proportional to 31,680.11, 43,726.34 and 18,940.84 is: 26,143.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,680.11 : 43,726.34 = 18,940.84 : x
  2. Step 2: Convert to fraction form
    31,680.11/43,726.34 = 18,940.84/x
  3. Step 3: Cross multiply
    31,680.11x = 43,726.34 × 18,940.84
  4. Step 4: Simplify right side
    31,680.11x = 828,213,547.76
  5. Step 5: Solve for x
    x = 828,213,547.76/31,680.11
  6. Step 6: Final answer
    x = 26,143.01

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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.