Home / 18,966.84-28,427.21-13,421.80

Finding the Fourth Proportional to 18,966.84, 28,427.21 and 13,421.80

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Solution

The fourth proportional to 18,966.84, 28,427.21 and 13,421.80 is: 20,116.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,966.84 : 28,427.21 = 13,421.80 : x
  2. Step 2: Convert to fraction form
    18,966.84/28,427.21 = 13,421.80/x
  3. Step 3: Cross multiply
    18,966.84x = 28,427.21 × 13,421.80
  4. Step 4: Simplify right side
    18,966.84x = 381,544,327.18
  5. Step 5: Solve for x
    x = 381,544,327.18/18,966.84
  6. Step 6: Final answer
    x = 20,116.39

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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.