Home / 13,288.21-18,337.05-7,319.75

Finding the Fourth Proportional to 13,288.21, 18,337.05 and 7,319.75

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Solution

The fourth proportional to 13,288.21, 18,337.05 and 7,319.75 is: 10,100.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,288.21 : 18,337.05 = 7,319.75 : x
  2. Step 2: Convert to fraction form
    13,288.21/18,337.05 = 7,319.75/x
  3. Step 3: Cross multiply
    13,288.21x = 18,337.05 × 7,319.75
  4. Step 4: Simplify right side
    13,288.21x = 134,222,621.74
  5. Step 5: Solve for x
    x = 134,222,621.74/13,288.21
  6. Step 6: Final answer
    x = 10,100.88

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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.