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Finding the Fourth Proportional to 30,368, 45,575.54 and 21,073.28

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Solution

The fourth proportional to 30,368, 45,575.54 and 21,073.28 is: 31,626.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,368 : 45,575.54 = 21,073.28 : x
  2. Step 2: Convert to fraction form
    30,368/45,575.54 = 21,073.28/x
  3. Step 3: Cross multiply
    30,368x = 45,575.54 × 21,073.28
  4. Step 4: Simplify right side
    30,368x = 960,426,115.57
  5. Step 5: Solve for x
    x = 960,426,115.57/30,368
  6. Step 6: Final answer
    x = 31,626.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.