Home / 28,107.56-38,786.91-15,531.50

Finding the Fourth Proportional to 28,107.56, 38,786.91 and 15,531.50

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Solution

The fourth proportional to 28,107.56, 38,786.91 and 15,531.50 is: 21,432.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,107.56 : 38,786.91 = 15,531.50 : x
  2. Step 2: Convert to fraction form
    28,107.56/38,786.91 = 15,531.50/x
  3. Step 3: Cross multiply
    28,107.56x = 38,786.91 × 15,531.50
  4. Step 4: Simplify right side
    28,107.56x = 602,418,892.67
  5. Step 5: Solve for x
    x = 602,418,892.67/28,107.56
  6. Step 6: Final answer
    x = 21,432.63

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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.