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Finding the Fourth Proportional to 15,573.20, 21,490.71 and 8,499.67

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Solution

The fourth proportional to 15,573.20, 21,490.71 and 8,499.67 is: 11,729.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,573.20 : 21,490.71 = 8,499.67 : x
  2. Step 2: Convert to fraction form
    15,573.20/21,490.71 = 8,499.67/x
  3. Step 3: Cross multiply
    15,573.20x = 21,490.71 × 8,499.67
  4. Step 4: Simplify right side
    15,573.20x = 182,664,026.16
  5. Step 5: Solve for x
    x = 182,664,026.16/15,573.20
  6. Step 6: Final answer
    x = 11,729.38

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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.