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Finding the Fourth Proportional to 15,496.88, 21,385.84 and 8,423.32

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Solution

The fourth proportional to 15,496.88, 21,385.84 and 8,423.32 is: 11,624.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,496.88 : 21,385.84 = 8,423.32 : x
  2. Step 2: Convert to fraction form
    15,496.88/21,385.84 = 8,423.32/x
  3. Step 3: Cross multiply
    15,496.88x = 21,385.84 × 8,423.32
  4. Step 4: Simplify right side
    15,496.88x = 180,139,731.67
  5. Step 5: Solve for x
    x = 180,139,731.67/15,496.88
  6. Step 6: Final answer
    x = 11,624.26

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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.