Home / 13,688.12-20,539.88-7,448.56

Finding the Fourth Proportional to 13,688.12, 20,539.88 and 7,448.56

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Solution

The fourth proportional to 13,688.12, 20,539.88 and 7,448.56 is: 11,177.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,688.12 : 20,539.88 = 7,448.56 : x
  2. Step 2: Convert to fraction form
    13,688.12/20,539.88 = 7,448.56/x
  3. Step 3: Cross multiply
    13,688.12x = 20,539.88 × 7,448.56
  4. Step 4: Simplify right side
    13,688.12x = 152,992,528.57
  5. Step 5: Solve for x
    x = 152,992,528.57/13,688.12
  6. Step 6: Final answer
    x = 11,177.03

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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.