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Finding the Fourth Proportional to 15,087.55, 20,822.12 and 8,374.47

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Solution

The fourth proportional to 15,087.55, 20,822.12 and 8,374.47 is: 11,557.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,087.55 : 20,822.12 = 8,374.47 : x
  2. Step 2: Convert to fraction form
    15,087.55/20,822.12 = 8,374.47/x
  3. Step 3: Cross multiply
    15,087.55x = 20,822.12 × 8,374.47
  4. Step 4: Simplify right side
    15,087.55x = 174,374,208.81
  5. Step 5: Solve for x
    x = 174,374,208.81/15,087.55
  6. Step 6: Final answer
    x = 11,557.49

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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.