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Finding the Fourth Proportional to 28,247, 38,980.84 and 15,500.26

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Solution

The fourth proportional to 28,247, 38,980.84 and 15,500.26 is: 21,390.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,247 : 38,980.84 = 15,500.26 : x
  2. Step 2: Convert to fraction form
    28,247/38,980.84 = 15,500.26/x
  3. Step 3: Cross multiply
    28,247x = 38,980.84 × 15,500.26
  4. Step 4: Simplify right side
    28,247x = 604,213,155.02
  5. Step 5: Solve for x
    x = 604,213,155.02/28,247
  6. Step 6: Final answer
    x = 21,390.35

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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.