Home / 28,720.18-39,627.98-16,781.21

Finding the Fourth Proportional to 28,720.18, 39,627.98 and 16,781.21

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Solution

The fourth proportional to 28,720.18, 39,627.98 and 16,781.21 is: 23,154.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,720.18 : 39,627.98 = 16,781.21 : x
  2. Step 2: Convert to fraction form
    28,720.18/39,627.98 = 16,781.21/x
  3. Step 3: Cross multiply
    28,720.18x = 39,627.98 × 16,781.21
  4. Step 4: Simplify right side
    28,720.18x = 665,005,454.26
  5. Step 5: Solve for x
    x = 665,005,454.26/28,720.18
  6. Step 6: Final answer
    x = 23,154.64

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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.