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Finding the Fourth Proportional to 9,363.88, 12,921.09 and 5,386.30

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Solution

The fourth proportional to 9,363.88, 12,921.09 and 5,386.30 is: 7,432.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,363.88 : 12,921.09 = 5,386.30 : x
  2. Step 2: Convert to fraction form
    9,363.88/12,921.09 = 5,386.30/x
  3. Step 3: Cross multiply
    9,363.88x = 12,921.09 × 5,386.30
  4. Step 4: Simplify right side
    9,363.88x = 69,596,867.07
  5. Step 5: Solve for x
    x = 69,596,867.07/9,363.88
  6. Step 6: Final answer
    x = 7,432.48

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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.