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Finding the Fourth Proportional to 28,197.50, 38,913.83 and 15,622.25

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Solution

The fourth proportional to 28,197.50, 38,913.83 and 15,622.25 is: 21,559.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,197.50 : 38,913.83 = 15,622.25 : x
  2. Step 2: Convert to fraction form
    28,197.50/38,913.83 = 15,622.25/x
  3. Step 3: Cross multiply
    28,197.50x = 38,913.83 × 15,622.25
  4. Step 4: Simplify right side
    28,197.50x = 607,921,502.61
  5. Step 5: Solve for x
    x = 607,921,502.61/28,197.50
  6. Step 6: Final answer
    x = 21,559.41

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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.