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Finding the Fourth Proportional to 15,495.84, 21,384.88 and 8,422.25

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Solution

The fourth proportional to 15,495.84, 21,384.88 and 8,422.25 is: 11,623.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,495.84 : 21,384.88 = 8,422.25 : x
  2. Step 2: Convert to fraction form
    15,495.84/21,384.88 = 8,422.25/x
  3. Step 3: Cross multiply
    15,495.84x = 21,384.88 × 8,422.25
  4. Step 4: Simplify right side
    15,495.84x = 180,108,677.60
  5. Step 5: Solve for x
    x = 180,108,677.60/15,495.84
  6. Step 6: Final answer
    x = 11,623.03

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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.