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Finding the Fourth Proportional to 28,459.51, 42,685.61 and 8,736.41

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Solution

The fourth proportional to 28,459.51, 42,685.61 and 8,736.41 is: 13,103.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,459.51 : 42,685.61 = 8,736.41 : x
  2. Step 2: Convert to fraction form
    28,459.51/42,685.61 = 8,736.41/x
  3. Step 3: Cross multiply
    28,459.51x = 42,685.61 × 8,736.41
  4. Step 4: Simplify right side
    28,459.51x = 372,919,053.09
  5. Step 5: Solve for x
    x = 372,919,053.09/28,459.51
  6. Step 6: Final answer
    x = 13,103.50

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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.