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Finding the Fourth Proportional to 15,495.84, 21,384.27 and 8,422.29

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Solution

The fourth proportional to 15,495.84, 21,384.27 and 8,422.29 is: 11,622.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,495.84 : 21,384.27 = 8,422.29 : x
  2. Step 2: Convert to fraction form
    15,495.84/21,384.27 = 8,422.29/x
  3. Step 3: Cross multiply
    15,495.84x = 21,384.27 × 8,422.29
  4. Step 4: Simplify right side
    15,495.84x = 180,104,523.38
  5. Step 5: Solve for x
    x = 180,104,523.38/15,495.84
  6. Step 6: Final answer
    x = 11,622.77

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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.