Home / 20,352.89-28,088.70-11,400.23

Finding the Fourth Proportional to 20,352.89, 28,088.70 and 11,400.23

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Solution

The fourth proportional to 20,352.89, 28,088.70 and 11,400.23 is: 15,733.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,352.89 : 28,088.70 = 11,400.23 : x
  2. Step 2: Convert to fraction form
    20,352.89/28,088.70 = 11,400.23/x
  3. Step 3: Cross multiply
    20,352.89x = 28,088.70 × 11,400.23
  4. Step 4: Simplify right side
    20,352.89x = 320,217,640.40
  5. Step 5: Solve for x
    x = 320,217,640.40/20,352.89
  6. Step 6: Final answer
    x = 15,733.28

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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.