Home / 21,154.79-31,670.42-18,335.04

Finding the Fourth Proportional to 21,154.79, 31,670.42 and 18,335.04

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Solution

The fourth proportional to 21,154.79, 31,670.42 and 18,335.04 is: 27,449.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,154.79 : 31,670.42 = 18,335.04 : x
  2. Step 2: Convert to fraction form
    21,154.79/31,670.42 = 18,335.04/x
  3. Step 3: Cross multiply
    21,154.79x = 31,670.42 × 18,335.04
  4. Step 4: Simplify right side
    21,154.79x = 580,678,325.84
  5. Step 5: Solve for x
    x = 580,678,325.84/21,154.79
  6. Step 6: Final answer
    x = 27,449.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.