Home / 28,309.30-39,066.60-15,388.45

Finding the Fourth Proportional to 28,309.30, 39,066.60 and 15,388.45

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Solution

The fourth proportional to 28,309.30, 39,066.60 and 15,388.45 is: 21,235.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,309.30 : 39,066.60 = 15,388.45 : x
  2. Step 2: Convert to fraction form
    28,309.30/39,066.60 = 15,388.45/x
  3. Step 3: Cross multiply
    28,309.30x = 39,066.60 × 15,388.45
  4. Step 4: Simplify right side
    28,309.30x = 601,174,420.77
  5. Step 5: Solve for x
    x = 601,174,420.77/28,309.30
  6. Step 6: Final answer
    x = 21,235.93

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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.