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Finding the Fourth Proportional to 28,490.76, 42,736.14 and 18,070.92

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Solution

The fourth proportional to 28,490.76, 42,736.14 and 18,070.92 is: 27,106.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,490.76 : 42,736.14 = 18,070.92 : x
  2. Step 2: Convert to fraction form
    28,490.76/42,736.14 = 18,070.92/x
  3. Step 3: Cross multiply
    28,490.76x = 42,736.14 × 18,070.92
  4. Step 4: Simplify right side
    28,490.76x = 772,281,367.05
  5. Step 5: Solve for x
    x = 772,281,367.05/28,490.76
  6. Step 6: Final answer
    x = 27,106.38

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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.