Home / 15,385.51-21,231.75-8,671.80

Finding the Fourth Proportional to 15,385.51, 21,231.75 and 8,671.80

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Solution

The fourth proportional to 15,385.51, 21,231.75 and 8,671.80 is: 11,966.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,385.51 : 21,231.75 = 8,671.80 : x
  2. Step 2: Convert to fraction form
    15,385.51/21,231.75 = 8,671.80/x
  3. Step 3: Cross multiply
    15,385.51x = 21,231.75 × 8,671.80
  4. Step 4: Simplify right side
    15,385.51x = 184,117,489.65
  5. Step 5: Solve for x
    x = 184,117,489.65/15,385.51
  6. Step 6: Final answer
    x = 11,966.94

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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.