Home / 15,455.15-21,330.77-8,742.86

Finding the Fourth Proportional to 15,455.15, 21,330.77 and 8,742.86

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Solution

The fourth proportional to 15,455.15, 21,330.77 and 8,742.86 is: 12,066.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,455.15 : 21,330.77 = 8,742.86 : x
  2. Step 2: Convert to fraction form
    15,455.15/21,330.77 = 8,742.86/x
  3. Step 3: Cross multiply
    15,455.15x = 21,330.77 × 8,742.86
  4. Step 4: Simplify right side
    15,455.15x = 186,491,935.80
  5. Step 5: Solve for x
    x = 186,491,935.80/15,455.15
  6. Step 6: Final answer
    x = 12,066.65

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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.