Home / 31,236.36-43,124-20,656.68

Finding the Fourth Proportional to 31,236.36, 43,124 and 20,656.68

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Solution

The fourth proportional to 31,236.36, 43,124 and 20,656.68 is: 28,518.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,236.36 : 43,124 = 20,656.68 : x
  2. Step 2: Convert to fraction form
    31,236.36/43,124 = 20,656.68/x
  3. Step 3: Cross multiply
    31,236.36x = 43,124 × 20,656.68
  4. Step 4: Simplify right side
    31,236.36x = 890,798,668.32
  5. Step 5: Solve for x
    x = 890,798,668.32/31,236.36
  6. Step 6: Final answer
    x = 28,518.00

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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.