Home / 28,363.84-39,139.70-16,720.20

Finding the Fourth Proportional to 28,363.84, 39,139.70 and 16,720.20

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Solution

The fourth proportional to 28,363.84, 39,139.70 and 16,720.20 is: 23,072.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,363.84 : 39,139.70 = 16,720.20 : x
  2. Step 2: Convert to fraction form
    28,363.84/39,139.70 = 16,720.20/x
  3. Step 3: Cross multiply
    28,363.84x = 39,139.70 × 16,720.20
  4. Step 4: Simplify right side
    28,363.84x = 654,423,611.94
  5. Step 5: Solve for x
    x = 654,423,611.94/28,363.84
  6. Step 6: Final answer
    x = 23,072.46

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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.