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Finding the Fourth Proportional to 15,394.70, 21,244.70 and 8,321.14

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Solution

The fourth proportional to 15,394.70, 21,244.70 and 8,321.14 is: 11,483.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,394.70 : 21,244.70 = 8,321.14 : x
  2. Step 2: Convert to fraction form
    15,394.70/21,244.70 = 8,321.14/x
  3. Step 3: Cross multiply
    15,394.70x = 21,244.70 × 8,321.14
  4. Step 4: Simplify right side
    15,394.70x = 176,779,975.13
  5. Step 5: Solve for x
    x = 176,779,975.13/15,394.70
  6. Step 6: Final answer
    x = 11,483.17

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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.