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Finding the Fourth Proportional to 53,979.18, 80,980.29 and 18,920.94

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Solution

The fourth proportional to 53,979.18, 80,980.29 and 18,920.94 is: 28,385.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,979.18 : 80,980.29 = 18,920.94 : x
  2. Step 2: Convert to fraction form
    53,979.18/80,980.29 = 18,920.94/x
  3. Step 3: Cross multiply
    53,979.18x = 80,980.29 × 18,920.94
  4. Step 4: Simplify right side
    53,979.18x = 1,532,223,208.27
  5. Step 5: Solve for x
    x = 1,532,223,208.27/53,979.18
  6. Step 6: Final answer
    x = 28,385.45

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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.