Home / 28,685.81-42,966.40-13,863.64

Finding the Fourth Proportional to 28,685.81, 42,966.40 and 13,863.64

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Solution

The fourth proportional to 28,685.81, 42,966.40 and 13,863.64 is: 20,765.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,685.81 : 42,966.40 = 13,863.64 : x
  2. Step 2: Convert to fraction form
    28,685.81/42,966.40 = 13,863.64/x
  3. Step 3: Cross multiply
    28,685.81x = 42,966.40 × 13,863.64
  4. Step 4: Simplify right side
    28,685.81x = 595,670,701.70
  5. Step 5: Solve for x
    x = 595,670,701.70/28,685.81
  6. Step 6: Final answer
    x = 20,765.34

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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.