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Finding the Fourth Proportional to 5,381.88, 7,430.46 and 4,821.36

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Solution

The fourth proportional to 5,381.88, 7,430.46 and 4,821.36 is: 6,656.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,381.88 : 7,430.46 = 4,821.36 : x
  2. Step 2: Convert to fraction form
    5,381.88/7,430.46 = 4,821.36/x
  3. Step 3: Cross multiply
    5,381.88x = 7,430.46 × 4,821.36
  4. Step 4: Simplify right side
    5,381.88x = 35,824,922.63
  5. Step 5: Solve for x
    x = 35,824,922.63/5,381.88
  6. Step 6: Final answer
    x = 6,656.58

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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.