Home / 28,100.12-42,170.96-13,309.07

Finding the Fourth Proportional to 28,100.12, 42,170.96 and 13,309.07

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Solution

The fourth proportional to 28,100.12, 42,170.96 and 13,309.07 is: 19,973.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,100.12 : 42,170.96 = 13,309.07 : x
  2. Step 2: Convert to fraction form
    28,100.12/42,170.96 = 13,309.07/x
  3. Step 3: Cross multiply
    28,100.12x = 42,170.96 × 13,309.07
  4. Step 4: Simplify right side
    28,100.12x = 561,256,081.03
  5. Step 5: Solve for x
    x = 561,256,081.03/28,100.12
  6. Step 6: Final answer
    x = 19,973.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.