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Finding the Fourth Proportional to 18,603.32, 28,015 and 13,445.24

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Solution

The fourth proportional to 18,603.32, 28,015 and 13,445.24 is: 20,247.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,603.32 : 28,015 = 13,445.24 : x
  2. Step 2: Convert to fraction form
    18,603.32/28,015 = 13,445.24/x
  3. Step 3: Cross multiply
    18,603.32x = 28,015 × 13,445.24
  4. Step 4: Simplify right side
    18,603.32x = 376,668,398.60
  5. Step 5: Solve for x
    x = 376,668,398.60/18,603.32
  6. Step 6: Final answer
    x = 20,247.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.