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Finding the Fourth Proportional to 31,980.51, 44,141.02 and 21,788.41

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Solution

The fourth proportional to 31,980.51, 44,141.02 and 21,788.41 is: 30,073.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,980.51 : 44,141.02 = 21,788.41 : x
  2. Step 2: Convert to fraction form
    31,980.51/44,141.02 = 21,788.41/x
  3. Step 3: Cross multiply
    31,980.51x = 44,141.02 × 21,788.41
  4. Step 4: Simplify right side
    31,980.51x = 961,762,587.11
  5. Step 5: Solve for x
    x = 961,762,587.11/31,980.51
  6. Step 6: Final answer
    x = 30,073.40

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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.