Home / 15,385.16-21,231.50-8,672.42

Finding the Fourth Proportional to 15,385.16, 21,231.50 and 8,672.42

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Solution

The fourth proportional to 15,385.16, 21,231.50 and 8,672.42 is: 11,967.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,385.16 : 21,231.50 = 8,672.42 : x
  2. Step 2: Convert to fraction form
    15,385.16/21,231.50 = 8,672.42/x
  3. Step 3: Cross multiply
    15,385.16x = 21,231.50 × 8,672.42
  4. Step 4: Simplify right side
    15,385.16x = 184,128,485.23
  5. Step 5: Solve for x
    x = 184,128,485.23/15,385.16
  6. Step 6: Final answer
    x = 11,967.93

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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.