Home / 13,438.04-18,543.24-7,771.88

Finding the Fourth Proportional to 13,438.04, 18,543.24 and 7,771.88

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Solution

The fourth proportional to 13,438.04, 18,543.24 and 7,771.88 is: 10,724.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,438.04 : 18,543.24 = 7,771.88 : x
  2. Step 2: Convert to fraction form
    13,438.04/18,543.24 = 7,771.88/x
  3. Step 3: Cross multiply
    13,438.04x = 18,543.24 × 7,771.88
  4. Step 4: Simplify right side
    13,438.04x = 144,115,836.09
  5. Step 5: Solve for x
    x = 144,115,836.09/13,438.04
  6. Step 6: Final answer
    x = 10,724.47

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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.