Home / 11,521.64-15,900.30-6,486.78

Finding the Fourth Proportional to 11,521.64, 15,900.30 and 6,486.78

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Solution

The fourth proportional to 11,521.64, 15,900.30 and 6,486.78 is: 8,952.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,521.64 : 15,900.30 = 6,486.78 : x
  2. Step 2: Convert to fraction form
    11,521.64/15,900.30 = 6,486.78/x
  3. Step 3: Cross multiply
    11,521.64x = 15,900.30 × 6,486.78
  4. Step 4: Simplify right side
    11,521.64x = 103,141,807.66
  5. Step 5: Solve for x
    x = 103,141,807.66/11,521.64
  6. Step 6: Final answer
    x = 8,952.01

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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.