Home / 31,057.30-42,852.48-20,317.90

Finding the Fourth Proportional to 31,057.30, 42,852.48 and 20,317.90

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Solution

The fourth proportional to 31,057.30, 42,852.48 and 20,317.90 is: 28,034.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,057.30 : 42,852.48 = 20,317.90 : x
  2. Step 2: Convert to fraction form
    31,057.30/42,852.48 = 20,317.90/x
  3. Step 3: Cross multiply
    31,057.30x = 42,852.48 × 20,317.90
  4. Step 4: Simplify right side
    31,057.30x = 870,672,403.39
  5. Step 5: Solve for x
    x = 870,672,403.39/31,057.30
  6. Step 6: Final answer
    x = 28,034.39

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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.