Home / 13,955.40-20,933.10-12,886.20

Finding the Fourth Proportional to 13,955.40, 20,933.10 and 12,886.20

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Solution

The fourth proportional to 13,955.40, 20,933.10 and 12,886.20 is: 19,329.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,955.40 : 20,933.10 = 12,886.20 : x
  2. Step 2: Convert to fraction form
    13,955.40/20,933.10 = 12,886.20/x
  3. Step 3: Cross multiply
    13,955.40x = 20,933.10 × 12,886.20
  4. Step 4: Simplify right side
    13,955.40x = 269,748,113.22
  5. Step 5: Solve for x
    x = 269,748,113.22/13,955.40
  6. Step 6: Final answer
    x = 19,329.30

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Similar ratio
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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.