Home / 11,312.11-15,617.58-8,789.45

Finding the Fourth Proportional to 11,312.11, 15,617.58 and 8,789.45

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Solution

The fourth proportional to 11,312.11, 15,617.58 and 8,789.45 is: 12,134.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,312.11 : 15,617.58 = 8,789.45 : x
  2. Step 2: Convert to fraction form
    11,312.11/15,617.58 = 8,789.45/x
  3. Step 3: Cross multiply
    11,312.11x = 15,617.58 × 8,789.45
  4. Step 4: Simplify right side
    11,312.11x = 137,270,036.63
  5. Step 5: Solve for x
    x = 137,270,036.63/11,312.11
  6. Step 6: Final answer
    x = 12,134.79

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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.