Home / 20,887.45-28,807.89-18,364.16

Finding the Fourth Proportional to 20,887.45, 28,807.89 and 18,364.16

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Solution

The fourth proportional to 20,887.45, 28,807.89 and 18,364.16 is: 25,327.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887.45 : 28,807.89 = 18,364.16 : x
  2. Step 2: Convert to fraction form
    20,887.45/28,807.89 = 18,364.16/x
  3. Step 3: Cross multiply
    20,887.45x = 28,807.89 × 18,364.16
  4. Step 4: Simplify right side
    20,887.45x = 529,032,701.22
  5. Step 5: Solve for x
    x = 529,032,701.22/20,887.45
  6. Step 6: Final answer
    x = 25,327.78

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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.