Home / 28,021.28-38,669.40-15,446

Finding the Fourth Proportional to 28,021.28, 38,669.40 and 15,446

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Solution

The fourth proportional to 28,021.28, 38,669.40 and 15,446 is: 21,315.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,021.28 : 38,669.40 = 15,446 : x
  2. Step 2: Convert to fraction form
    28,021.28/38,669.40 = 15,446/x
  3. Step 3: Cross multiply
    28,021.28x = 38,669.40 × 15,446
  4. Step 4: Simplify right side
    28,021.28x = 597,287,552.40
  5. Step 5: Solve for x
    x = 597,287,552.40/28,021.28
  6. Step 6: Final answer
    x = 21,315.50

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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.