Home / 11,345.64-15,664.74-8,688.36

Finding the Fourth Proportional to 11,345.64, 15,664.74 and 8,688.36

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Solution

The fourth proportional to 11,345.64, 15,664.74 and 8,688.36 is: 11,995.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,345.64 : 15,664.74 = 8,688.36 : x
  2. Step 2: Convert to fraction form
    11,345.64/15,664.74 = 8,688.36/x
  3. Step 3: Cross multiply
    11,345.64x = 15,664.74 × 8,688.36
  4. Step 4: Simplify right side
    11,345.64x = 136,100,900.43
  5. Step 5: Solve for x
    x = 136,100,900.43/11,345.64
  6. Step 6: Final answer
    x = 11,995.88

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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.