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Finding the Fourth Proportional to 13,287.88, 18,337.49 and 7,319.49

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Solution

The fourth proportional to 13,287.88, 18,337.49 and 7,319.49 is: 10,101.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,287.88 : 18,337.49 = 7,319.49 : x
  2. Step 2: Convert to fraction form
    13,287.88/18,337.49 = 7,319.49/x
  3. Step 3: Cross multiply
    13,287.88x = 18,337.49 × 7,319.49
  4. Step 4: Simplify right side
    13,287.88x = 134,221,074.68
  5. Step 5: Solve for x
    x = 134,221,074.68/13,287.88
  6. Step 6: Final answer
    x = 10,101.01

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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.