Home / 9,412.40-12,989.88-5,222

Finding the Fourth Proportional to 9,412.40, 12,989.88 and 5,222

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Solution

The fourth proportional to 9,412.40, 12,989.88 and 5,222 is: 7,206.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,412.40 : 12,989.88 = 5,222 : x
  2. Step 2: Convert to fraction form
    9,412.40/12,989.88 = 5,222/x
  3. Step 3: Cross multiply
    9,412.40x = 12,989.88 × 5,222
  4. Step 4: Simplify right side
    9,412.40x = 67,833,153.36
  5. Step 5: Solve for x
    x = 67,833,153.36/9,412.40
  6. Step 6: Final answer
    x = 7,206.79

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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.