Home / 7,218.89-9,956.81-5,521.23

Finding the Fourth Proportional to 7,218.89, 9,956.81 and 5,521.23

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Solution

The fourth proportional to 7,218.89, 9,956.81 and 5,521.23 is: 7,615.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,218.89 : 9,956.81 = 5,521.23 : x
  2. Step 2: Convert to fraction form
    7,218.89/9,956.81 = 5,521.23/x
  3. Step 3: Cross multiply
    7,218.89x = 9,956.81 × 5,521.23
  4. Step 4: Simplify right side
    7,218.89x = 54,973,838.08
  5. Step 5: Solve for x
    x = 54,973,838.08/7,218.89
  6. Step 6: Final answer
    x = 7,615.28

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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.