Home / 15,516.32-21,411.88-8,442.75

Finding the Fourth Proportional to 15,516.32, 21,411.88 and 8,442.75

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Solution

The fourth proportional to 15,516.32, 21,411.88 and 8,442.75 is: 11,650.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,516.32 : 21,411.88 = 8,442.75 : x
  2. Step 2: Convert to fraction form
    15,516.32/21,411.88 = 8,442.75/x
  3. Step 3: Cross multiply
    15,516.32x = 21,411.88 × 8,442.75
  4. Step 4: Simplify right side
    15,516.32x = 180,775,149.87
  5. Step 5: Solve for x
    x = 180,775,149.87/15,516.32
  6. Step 6: Final answer
    x = 11,650.65

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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.