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Finding the Fourth Proportional to 53,278.88, 79,897.54 and 19,980.80

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Solution

The fourth proportional to 53,278.88, 79,897.54 and 19,980.80 is: 29,963.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,278.88 : 79,897.54 = 19,980.80 : x
  2. Step 2: Convert to fraction form
    53,278.88/79,897.54 = 19,980.80/x
  3. Step 3: Cross multiply
    53,278.88x = 79,897.54 × 19,980.80
  4. Step 4: Simplify right side
    53,278.88x = 1,596,416,767.23
  5. Step 5: Solve for x
    x = 1,596,416,767.23/53,278.88
  6. Step 6: Final answer
    x = 29,963.41

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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.