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Finding the Fourth Proportional to 12,365.61, 18,531.14 and 5,775.45

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Solution

The fourth proportional to 12,365.61, 18,531.14 and 5,775.45 is: 8,655.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,365.61 : 18,531.14 = 5,775.45 : x
  2. Step 2: Convert to fraction form
    12,365.61/18,531.14 = 5,775.45/x
  3. Step 3: Cross multiply
    12,365.61x = 18,531.14 × 5,775.45
  4. Step 4: Simplify right side
    12,365.61x = 107,025,643.64
  5. Step 5: Solve for x
    x = 107,025,643.64/12,365.61
  6. Step 6: Final answer
    x = 8,655.10

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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.