Home / 30,207.51-45,335.55-15,420.33

Finding the Fourth Proportional to 30,207.51, 45,335.55 and 15,420.33

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Solution

The fourth proportional to 30,207.51, 45,335.55 and 15,420.33 is: 23,142.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,207.51 : 45,335.55 = 15,420.33 : x
  2. Step 2: Convert to fraction form
    30,207.51/45,335.55 = 15,420.33/x
  3. Step 3: Cross multiply
    30,207.51x = 45,335.55 × 15,420.33
  4. Step 4: Simplify right side
    30,207.51x = 699,089,141.73
  5. Step 5: Solve for x
    x = 699,089,141.73/30,207.51
  6. Step 6: Final answer
    x = 23,142.89

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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.