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Finding the Fourth Proportional to 53,980.63, 81,007.09 and 18,920.28

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Solution

The fourth proportional to 53,980.63, 81,007.09 and 18,920.28 is: 28,393.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,980.63 : 81,007.09 = 18,920.28 : x
  2. Step 2: Convert to fraction form
    53,980.63/81,007.09 = 18,920.28/x
  3. Step 3: Cross multiply
    53,980.63x = 81,007.09 × 18,920.28
  4. Step 4: Simplify right side
    53,980.63x = 1,532,677,081.26
  5. Step 5: Solve for x
    x = 1,532,677,081.26/53,980.63
  6. Step 6: Final answer
    x = 28,393.09

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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.