Home / 8,736.80-12,063.68-5,381.28

Finding the Fourth Proportional to 8,736.80, 12,063.68 and 5,381.28

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Solution

The fourth proportional to 8,736.80, 12,063.68 and 5,381.28 is: 7,430.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,736.80 : 12,063.68 = 5,381.28 : x
  2. Step 2: Convert to fraction form
    8,736.80/12,063.68 = 5,381.28/x
  3. Step 3: Cross multiply
    8,736.80x = 12,063.68 × 5,381.28
  4. Step 4: Simplify right side
    8,736.80x = 64,918,039.91
  5. Step 5: Solve for x
    x = 64,918,039.91/8,736.80
  6. Step 6: Final answer
    x = 7,430.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.