Home / 28,720.47-43,087.58-13,912.08

Finding the Fourth Proportional to 28,720.47, 43,087.58 and 13,912.08

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Solution

The fourth proportional to 28,720.47, 43,087.58 and 13,912.08 is: 20,871.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,720.47 : 43,087.58 = 13,912.08 : x
  2. Step 2: Convert to fraction form
    28,720.47/43,087.58 = 13,912.08/x
  3. Step 3: Cross multiply
    28,720.47x = 43,087.58 × 13,912.08
  4. Step 4: Simplify right side
    28,720.47x = 599,437,859.97
  5. Step 5: Solve for x
    x = 599,437,859.97/28,720.47
  6. Step 6: Final answer
    x = 20,871.45

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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.