Home / 28,231.64-38,961.06-15,656.40

Finding the Fourth Proportional to 28,231.64, 38,961.06 and 15,656.40

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Solution

The fourth proportional to 28,231.64, 38,961.06 and 15,656.40 is: 21,606.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,231.64 : 38,961.06 = 15,656.40 : x
  2. Step 2: Convert to fraction form
    28,231.64/38,961.06 = 15,656.40/x
  3. Step 3: Cross multiply
    28,231.64x = 38,961.06 × 15,656.40
  4. Step 4: Simplify right side
    28,231.64x = 609,989,939.78
  5. Step 5: Solve for x
    x = 609,989,939.78/28,231.64
  6. Step 6: Final answer
    x = 21,606.61

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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.