Home / 18,966.71-28,427.02-13,421.68

Finding the Fourth Proportional to 18,966.71, 28,427.02 and 13,421.68

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Solution

The fourth proportional to 18,966.71, 28,427.02 and 13,421.68 is: 20,116.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,966.71 : 28,427.02 = 13,421.68 : x
  2. Step 2: Convert to fraction form
    18,966.71/28,427.02 = 13,421.68/x
  3. Step 3: Cross multiply
    18,966.71x = 28,427.02 × 13,421.68
  4. Step 4: Simplify right side
    18,966.71x = 381,538,365.79
  5. Step 5: Solve for x
    x = 381,538,365.79/18,966.71
  6. Step 6: Final answer
    x = 20,116.21

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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.