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Finding the Fourth Proportional to 8,720.70, 13,079.22 and 2,875.94

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Solution

The fourth proportional to 8,720.70, 13,079.22 and 2,875.94 is: 4,313.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.70 : 13,079.22 = 2,875.94 : x
  2. Step 2: Convert to fraction form
    8,720.70/13,079.22 = 2,875.94/x
  3. Step 3: Cross multiply
    8,720.70x = 13,079.22 × 2,875.94
  4. Step 4: Simplify right side
    8,720.70x = 37,615,051.97
  5. Step 5: Solve for x
    x = 37,615,051.97/8,720.70
  6. Step 6: Final answer
    x = 4,313.31

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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.