Home / 12,438.04-17,159.10-7,131.64

Finding the Fourth Proportional to 12,438.04, 17,159.10 and 7,131.64

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Solution

The fourth proportional to 12,438.04, 17,159.10 and 7,131.64 is: 9,838.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,438.04 : 17,159.10 = 7,131.64 : x
  2. Step 2: Convert to fraction form
    12,438.04/17,159.10 = 7,131.64/x
  3. Step 3: Cross multiply
    12,438.04x = 17,159.10 × 7,131.64
  4. Step 4: Simplify right side
    12,438.04x = 122,372,523.92
  5. Step 5: Solve for x
    x = 122,372,523.92/12,438.04
  6. Step 6: Final answer
    x = 9,838.57

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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.