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Finding the Fourth Proportional to 15,573.78, 21,491.73 and 8,500.05

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Solution

The fourth proportional to 15,573.78, 21,491.73 and 8,500.05 is: 11,730.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,573.78 : 21,491.73 = 8,500.05 : x
  2. Step 2: Convert to fraction form
    15,573.78/21,491.73 = 8,500.05/x
  3. Step 3: Cross multiply
    15,573.78x = 21,491.73 × 8,500.05
  4. Step 4: Simplify right side
    15,573.78x = 182,680,779.59
  5. Step 5: Solve for x
    x = 182,680,779.59/15,573.78
  6. Step 6: Final answer
    x = 11,730.02

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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.