Home / 15,385.26-21,231.27-8,670.78

Finding the Fourth Proportional to 15,385.26, 21,231.27 and 8,670.78

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Solution

The fourth proportional to 15,385.26, 21,231.27 and 8,670.78 is: 11,965.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,385.26 : 21,231.27 = 8,670.78 : x
  2. Step 2: Convert to fraction form
    15,385.26/21,231.27 = 8,670.78/x
  3. Step 3: Cross multiply
    15,385.26x = 21,231.27 × 8,670.78
  4. Step 4: Simplify right side
    15,385.26x = 184,091,671.29
  5. Step 5: Solve for x
    x = 184,091,671.29/15,385.26
  6. Step 6: Final answer
    x = 11,965.46

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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.