Home / 28,493.13-39,320.63-15,918.09

Finding the Fourth Proportional to 28,493.13, 39,320.63 and 15,918.09

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Solution

The fourth proportional to 28,493.13, 39,320.63 and 15,918.09 is: 21,967.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,493.13 : 39,320.63 = 15,918.09 : x
  2. Step 2: Convert to fraction form
    28,493.13/39,320.63 = 15,918.09/x
  3. Step 3: Cross multiply
    28,493.13x = 39,320.63 × 15,918.09
  4. Step 4: Simplify right side
    28,493.13x = 625,909,327.20
  5. Step 5: Solve for x
    x = 625,909,327.20/28,493.13
  6. Step 6: Final answer
    x = 21,967.03

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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.