Home / 28,138.59-38,828.97-15,563.34

Finding the Fourth Proportional to 28,138.59, 38,828.97 and 15,563.34

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Solution

The fourth proportional to 28,138.59, 38,828.97 and 15,563.34 is: 21,476.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,138.59 : 38,828.97 = 15,563.34 : x
  2. Step 2: Convert to fraction form
    28,138.59/38,828.97 = 15,563.34/x
  3. Step 3: Cross multiply
    28,138.59x = 38,828.97 × 15,563.34
  4. Step 4: Simplify right side
    28,138.59x = 604,308,461.96
  5. Step 5: Solve for x
    x = 604,308,461.96/28,138.59
  6. Step 6: Final answer
    x = 21,476.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.