Home / 53,078.18-79,648.30-19,821.20

Finding the Fourth Proportional to 53,078.18, 79,648.30 and 19,821.20

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Solution

The fourth proportional to 53,078.18, 79,648.30 and 19,821.20 is: 29,743.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,078.18 : 79,648.30 = 19,821.20 : x
  2. Step 2: Convert to fraction form
    53,078.18/79,648.30 = 19,821.20/x
  3. Step 3: Cross multiply
    53,078.18x = 79,648.30 × 19,821.20
  4. Step 4: Simplify right side
    53,078.18x = 1,578,724,883.96
  5. Step 5: Solve for x
    x = 1,578,724,883.96/53,078.18
  6. Step 6: Final answer
    x = 29,743.39

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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.