Home / 28,425.74-42,638.40-13,589.78

Finding the Fourth Proportional to 28,425.74, 42,638.40 and 13,589.78

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Solution

The fourth proportional to 28,425.74, 42,638.40 and 13,589.78 is: 20,384.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,425.74 : 42,638.40 = 13,589.78 : x
  2. Step 2: Convert to fraction form
    28,425.74/42,638.40 = 13,589.78/x
  3. Step 3: Cross multiply
    28,425.74x = 42,638.40 × 13,589.78
  4. Step 4: Simplify right side
    28,425.74x = 579,446,262.36
  5. Step 5: Solve for x
    x = 579,446,262.36/28,425.74
  6. Step 6: Final answer
    x = 20,384.57

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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.