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Finding the Fourth Proportional to 8,392.48, 12,570.49 and 8,159.20

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Solution

The fourth proportional to 8,392.48, 12,570.49 and 8,159.20 is: 12,221.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,392.48 : 12,570.49 = 8,159.20 : x
  2. Step 2: Convert to fraction form
    8,392.48/12,570.49 = 8,159.20/x
  3. Step 3: Cross multiply
    8,392.48x = 12,570.49 × 8,159.20
  4. Step 4: Simplify right side
    8,392.48x = 102,565,120.78
  5. Step 5: Solve for x
    x = 102,565,120.78/8,392.48
  6. Step 6: Final answer
    x = 12,221.08

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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.