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Finding the Fourth Proportional to 38,963.90, 53,769.10 and 21,967.99

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Solution

The fourth proportional to 38,963.90, 53,769.10 and 21,967.99 is: 30,315.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,963.90 : 53,769.10 = 21,967.99 : x
  2. Step 2: Convert to fraction form
    38,963.90/53,769.10 = 21,967.99/x
  3. Step 3: Cross multiply
    38,963.90x = 53,769.10 × 21,967.99
  4. Step 4: Simplify right side
    38,963.90x = 1,181,199,003.77
  5. Step 5: Solve for x
    x = 1,181,199,003.77/38,963.90
  6. Step 6: Final answer
    x = 30,315.22

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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.