Home / 20,473.79-28,253.16-11,521.78

Finding the Fourth Proportional to 20,473.79, 28,253.16 and 11,521.78

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Solution

The fourth proportional to 20,473.79, 28,253.16 and 11,521.78 is: 15,899.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,473.79 : 28,253.16 = 11,521.78 : x
  2. Step 2: Convert to fraction form
    20,473.79/28,253.16 = 11,521.78/x
  3. Step 3: Cross multiply
    20,473.79x = 28,253.16 × 11,521.78
  4. Step 4: Simplify right side
    20,473.79x = 325,526,623.19
  5. Step 5: Solve for x
    x = 325,526,623.19/20,473.79
  6. Step 6: Final answer
    x = 15,899.68

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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.