Home / 28,429.40-42,644.10-13,630.70

Finding the Fourth Proportional to 28,429.40, 42,644.10 and 13,630.70

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Solution

The fourth proportional to 28,429.40, 42,644.10 and 13,630.70 is: 20,446.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,429.40 : 42,644.10 = 13,630.70 : x
  2. Step 2: Convert to fraction form
    28,429.40/42,644.10 = 13,630.70/x
  3. Step 3: Cross multiply
    28,429.40x = 42,644.10 × 13,630.70
  4. Step 4: Simplify right side
    28,429.40x = 581,268,933.87
  5. Step 5: Solve for x
    x = 581,268,933.87/28,429.40
  6. Step 6: Final answer
    x = 20,446.05

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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.