Home / 28,213.50-38,934.64-15,638.25

Finding the Fourth Proportional to 28,213.50, 38,934.64 and 15,638.25

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Solution

The fourth proportional to 28,213.50, 38,934.64 and 15,638.25 is: 21,580.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,213.50 : 38,934.64 = 15,638.25 : x
  2. Step 2: Convert to fraction form
    28,213.50/38,934.64 = 15,638.25/x
  3. Step 3: Cross multiply
    28,213.50x = 38,934.64 × 15,638.25
  4. Step 4: Simplify right side
    28,213.50x = 608,869,555.79
  5. Step 5: Solve for x
    x = 608,869,555.79/28,213.50
  6. Step 6: Final answer
    x = 21,580.79

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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.