Home / 20,154.38-27,820.79-13,437.55

Finding the Fourth Proportional to 20,154.38, 27,820.79 and 13,437.55

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Solution

The fourth proportional to 20,154.38, 27,820.79 and 13,437.55 is: 18,548.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,154.38 : 27,820.79 = 13,437.55 : x
  2. Step 2: Convert to fraction form
    20,154.38/27,820.79 = 13,437.55/x
  3. Step 3: Cross multiply
    20,154.38x = 27,820.79 × 13,437.55
  4. Step 4: Simplify right side
    20,154.38x = 373,843,256.66
  5. Step 5: Solve for x
    x = 373,843,256.66/20,154.38
  6. Step 6: Final answer
    x = 18,548.98

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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.