Home / 15,516.16-21,411.68-8,442.56

Finding the Fourth Proportional to 15,516.16, 21,411.68 and 8,442.56

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Solution

The fourth proportional to 15,516.16, 21,411.68 and 8,442.56 is: 11,650.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,516.16 : 21,411.68 = 8,442.56 : x
  2. Step 2: Convert to fraction form
    15,516.16/21,411.68 = 8,442.56/x
  3. Step 3: Cross multiply
    15,516.16x = 21,411.68 × 8,442.56
  4. Step 4: Simplify right side
    15,516.16x = 180,769,393.10
  5. Step 5: Solve for x
    x = 180,769,393.10/15,516.16
  6. Step 6: Final answer
    x = 11,650.40

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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.