Home / 15,505.06-21,400.38-10,200.40

Finding the Fourth Proportional to 15,505.06, 21,400.38 and 10,200.40

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Solution

The fourth proportional to 15,505.06, 21,400.38 and 10,200.40 is: 14,078.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,505.06 : 21,400.38 = 10,200.40 : x
  2. Step 2: Convert to fraction form
    15,505.06/21,400.38 = 10,200.40/x
  3. Step 3: Cross multiply
    15,505.06x = 21,400.38 × 10,200.40
  4. Step 4: Simplify right side
    15,505.06x = 218,292,436.15
  5. Step 5: Solve for x
    x = 218,292,436.15/15,505.06
  6. Step 6: Final answer
    x = 14,078.79

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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.