Home / 42,485.90-63,728.84-20,231.80

Finding the Fourth Proportional to 42,485.90, 63,728.84 and 20,231.80

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Solution

The fourth proportional to 42,485.90, 63,728.84 and 20,231.80 is: 30,347.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,485.90 : 63,728.84 = 20,231.80 : x
  2. Step 2: Convert to fraction form
    42,485.90/63,728.84 = 20,231.80/x
  3. Step 3: Cross multiply
    42,485.90x = 63,728.84 × 20,231.80
  4. Step 4: Simplify right side
    42,485.90x = 1,289,349,036.37
  5. Step 5: Solve for x
    x = 1,289,349,036.37/42,485.90
  6. Step 6: Final answer
    x = 30,347.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.