Home / 20,108.79-27,752.67-13,215.78

Finding the Fourth Proportional to 20,108.79, 27,752.67 and 13,215.78

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Solution

The fourth proportional to 20,108.79, 27,752.67 and 13,215.78 is: 18,239.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,108.79 : 27,752.67 = 13,215.78 : x
  2. Step 2: Convert to fraction form
    20,108.79/27,752.67 = 13,215.78/x
  3. Step 3: Cross multiply
    20,108.79x = 27,752.67 × 13,215.78
  4. Step 4: Simplify right side
    20,108.79x = 366,773,181.13
  5. Step 5: Solve for x
    x = 366,773,181.13/20,108.79
  6. Step 6: Final answer
    x = 18,239.45

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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.