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Finding the Fourth Proportional to 28,999.39, 40,018.49 and 16,899.10

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Solution

The fourth proportional to 28,999.39, 40,018.49 and 16,899.10 is: 23,320.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,999.39 : 40,018.49 = 16,899.10 : x
  2. Step 2: Convert to fraction form
    28,999.39/40,018.49 = 16,899.10/x
  3. Step 3: Cross multiply
    28,999.39x = 40,018.49 × 16,899.10
  4. Step 4: Simplify right side
    28,999.39x = 676,276,464.36
  5. Step 5: Solve for x
    x = 676,276,464.36/28,999.39
  6. Step 6: Final answer
    x = 23,320.37

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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.