Home / 9,120.72-13,681.10-5,222.40

Finding the Fourth Proportional to 9,120.72, 13,681.10 and 5,222.40

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Solution

The fourth proportional to 9,120.72, 13,681.10 and 5,222.40 is: 7,833.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,120.72 : 13,681.10 = 5,222.40 : x
  2. Step 2: Convert to fraction form
    9,120.72/13,681.10 = 5,222.40/x
  3. Step 3: Cross multiply
    9,120.72x = 13,681.10 × 5,222.40
  4. Step 4: Simplify right side
    9,120.72x = 71,448,138.39
  5. Step 5: Solve for x
    x = 71,448,138.39/9,120.72
  6. Step 6: Final answer
    x = 7,833.60

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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.