Home / 31,391.58-43,331.76-20,784.63

Finding the Fourth Proportional to 31,391.58, 43,331.76 and 20,784.63

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Solution

The fourth proportional to 31,391.58, 43,331.76 and 20,784.63 is: 28,690.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,391.58 : 43,331.76 = 20,784.63 : x
  2. Step 2: Convert to fraction form
    31,391.58/43,331.76 = 20,784.63/x
  3. Step 3: Cross multiply
    31,391.58x = 43,331.76 × 20,784.63
  4. Step 4: Simplify right side
    31,391.58x = 900,634,655.22
  5. Step 5: Solve for x
    x = 900,634,655.22/31,391.58
  6. Step 6: Final answer
    x = 28,690.32

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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.