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Finding the Fourth Proportional to 15,453.30, 21,329.28 and 9,081.30

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Solution

The fourth proportional to 15,453.30, 21,329.28 and 9,081.30 is: 12,534.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,453.30 : 21,329.28 = 9,081.30 : x
  2. Step 2: Convert to fraction form
    15,453.30/21,329.28 = 9,081.30/x
  3. Step 3: Cross multiply
    15,453.30x = 21,329.28 × 9,081.30
  4. Step 4: Simplify right side
    15,453.30x = 193,697,590.46
  5. Step 5: Solve for x
    x = 193,697,590.46/15,453.30
  6. Step 6: Final answer
    x = 12,534.38

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Double scale
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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.