Home / 28,543.10-39,427.13-21,910.68

Finding the Fourth Proportional to 28,543.10, 39,427.13 and 21,910.68

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Solution

The fourth proportional to 28,543.10, 39,427.13 and 21,910.68 is: 30,265.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,543.10 : 39,427.13 = 21,910.68 : x
  2. Step 2: Convert to fraction form
    28,543.10/39,427.13 = 21,910.68/x
  3. Step 3: Cross multiply
    28,543.10x = 39,427.13 × 21,910.68
  4. Step 4: Simplify right side
    28,543.10x = 863,875,119.20
  5. Step 5: Solve for x
    x = 863,875,119.20/28,543.10
  6. Step 6: Final answer
    x = 30,265.64

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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.