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Finding the Fourth Proportional to 52,362.76, 78,542.96 and 12,920.20

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Solution

The fourth proportional to 52,362.76, 78,542.96 and 12,920.20 is: 19,380.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,362.76 : 78,542.96 = 12,920.20 : x
  2. Step 2: Convert to fraction form
    52,362.76/78,542.96 = 12,920.20/x
  3. Step 3: Cross multiply
    52,362.76x = 78,542.96 × 12,920.20
  4. Step 4: Simplify right side
    52,362.76x = 1,014,790,751.79
  5. Step 5: Solve for x
    x = 1,014,790,751.79/52,362.76
  6. Step 6: Final answer
    x = 19,380.01

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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.