Home / 31,003.56-42,798-20,945.64

Finding the Fourth Proportional to 31,003.56, 42,798 and 20,945.64

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Solution

The fourth proportional to 31,003.56, 42,798 and 20,945.64 is: 28,913.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,003.56 : 42,798 = 20,945.64 : x
  2. Step 2: Convert to fraction form
    31,003.56/42,798 = 20,945.64/x
  3. Step 3: Cross multiply
    31,003.56x = 42,798 × 20,945.64
  4. Step 4: Simplify right side
    31,003.56x = 896,431,500.72
  5. Step 5: Solve for x
    x = 896,431,500.72/31,003.56
  6. Step 6: Final answer
    x = 28,913.82

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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.