Home / 20,739.80-31,085.40-15,539.60

Finding the Fourth Proportional to 20,739.80, 31,085.40 and 15,539.60

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Solution

The fourth proportional to 20,739.80, 31,085.40 and 15,539.60 is: 23,291.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.80 : 31,085.40 = 15,539.60 : x
  2. Step 2: Convert to fraction form
    20,739.80/31,085.40 = 15,539.60/x
  3. Step 3: Cross multiply
    20,739.80x = 31,085.40 × 15,539.60
  4. Step 4: Simplify right side
    20,739.80x = 483,054,681.84
  5. Step 5: Solve for x
    x = 483,054,681.84/20,739.80
  6. Step 6: Final answer
    x = 23,291.19

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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.