Home / 13,759.32-18,987.90-7,471.72

Finding the Fourth Proportional to 13,759.32, 18,987.90 and 7,471.72

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Solution

The fourth proportional to 13,759.32, 18,987.90 and 7,471.72 is: 10,310.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,759.32 : 18,987.90 = 7,471.72 : x
  2. Step 2: Convert to fraction form
    13,759.32/18,987.90 = 7,471.72/x
  3. Step 3: Cross multiply
    13,759.32x = 18,987.90 × 7,471.72
  4. Step 4: Simplify right side
    13,759.32x = 141,872,272.19
  5. Step 5: Solve for x
    x = 141,872,272.19/13,759.32
  6. Step 6: Final answer
    x = 10,310.99

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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.