Home / 13,618.32-20,417.88-5,291.40

Finding the Fourth Proportional to 13,618.32, 20,417.88 and 5,291.40

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Solution

The fourth proportional to 13,618.32, 20,417.88 and 5,291.40 is: 7,933.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,618.32 : 20,417.88 = 5,291.40 : x
  2. Step 2: Convert to fraction form
    13,618.32/20,417.88 = 5,291.40/x
  3. Step 3: Cross multiply
    13,618.32x = 20,417.88 × 5,291.40
  4. Step 4: Simplify right side
    13,618.32x = 108,039,170.23
  5. Step 5: Solve for x
    x = 108,039,170.23/13,618.32
  6. Step 6: Final answer
    x = 7,933.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.