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Finding the Fourth Proportional to 9,008.39, 12,420.02 and 7,387.33

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Solution

The fourth proportional to 9,008.39, 12,420.02 and 7,387.33 is: 10,185.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,008.39 : 12,420.02 = 7,387.33 : x
  2. Step 2: Convert to fraction form
    9,008.39/12,420.02 = 7,387.33/x
  3. Step 3: Cross multiply
    9,008.39x = 12,420.02 × 7,387.33
  4. Step 4: Simplify right side
    9,008.39x = 91,750,718.36
  5. Step 5: Solve for x
    x = 91,750,718.36/9,008.39
  6. Step 6: Final answer
    x = 10,185.04

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Double scale
Find fourth proportional to 9,009.39, 12,421.39 and 7,388.33
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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.