Home / 28,638.77-39,521.82-15,892.20

Finding the Fourth Proportional to 28,638.77, 39,521.82 and 15,892.20

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Solution

The fourth proportional to 28,638.77, 39,521.82 and 15,892.20 is: 21,931.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,638.77 : 39,521.82 = 15,892.20 : x
  2. Step 2: Convert to fraction form
    28,638.77/39,521.82 = 15,892.20/x
  3. Step 3: Cross multiply
    28,638.77x = 39,521.82 × 15,892.20
  4. Step 4: Simplify right side
    28,638.77x = 628,088,727.40
  5. Step 5: Solve for x
    x = 628,088,727.40/28,638.77
  6. Step 6: Final answer
    x = 21,931.42

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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.