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Finding the Fourth Proportional to 9,411.44, 12,988.08 and 5,220.08

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Solution

The fourth proportional to 9,411.44, 12,988.08 and 5,220.08 is: 7,203.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,411.44 : 12,988.08 = 5,220.08 : x
  2. Step 2: Convert to fraction form
    9,411.44/12,988.08 = 5,220.08/x
  3. Step 3: Cross multiply
    9,411.44x = 12,988.08 × 5,220.08
  4. Step 4: Simplify right side
    9,411.44x = 67,798,816.65
  5. Step 5: Solve for x
    x = 67,798,816.65/9,411.44
  6. Step 6: Final answer
    x = 7,203.87

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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.