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Finding the Fourth Proportional to 53,381.96, 80,071.37 and 13,939.07

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Solution

The fourth proportional to 53,381.96, 80,071.37 and 13,939.07 is: 20,908.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,381.96 : 80,071.37 = 13,939.07 : x
  2. Step 2: Convert to fraction form
    53,381.96/80,071.37 = 13,939.07/x
  3. Step 3: Cross multiply
    53,381.96x = 80,071.37 × 13,939.07
  4. Step 4: Simplify right side
    53,381.96x = 1,116,120,561.91
  5. Step 5: Solve for x
    x = 1,116,120,561.91/53,381.96
  6. Step 6: Final answer
    x = 20,908.20

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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.