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Finding the Fourth Proportional to 38,636.62, 53,314.95 and 21,869.62

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Solution

The fourth proportional to 38,636.62, 53,314.95 and 21,869.62 is: 30,178.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,636.62 : 53,314.95 = 21,869.62 : x
  2. Step 2: Convert to fraction form
    38,636.62/53,314.95 = 21,869.62/x
  3. Step 3: Cross multiply
    38,636.62x = 53,314.95 × 21,869.62
  4. Step 4: Simplify right side
    38,636.62x = 1,165,977,696.82
  5. Step 5: Solve for x
    x = 1,165,977,696.82/38,636.62
  6. Step 6: Final answer
    x = 30,178.05

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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.