Home / 13,438.60-18,538.18-7,984.56

Finding the Fourth Proportional to 13,438.60, 18,538.18 and 7,984.56

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Solution

The fourth proportional to 13,438.60, 18,538.18 and 7,984.56 is: 11,014.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,438.60 : 18,538.18 = 7,984.56 : x
  2. Step 2: Convert to fraction form
    13,438.60/18,538.18 = 7,984.56/x
  3. Step 3: Cross multiply
    13,438.60x = 18,538.18 × 7,984.56
  4. Step 4: Simplify right side
    13,438.60x = 148,019,210.50
  5. Step 5: Solve for x
    x = 148,019,210.50/13,438.60
  6. Step 6: Final answer
    x = 11,014.48

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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.