Home / 30,402.12-45,533.93-20,999.39

Finding the Fourth Proportional to 30,402.12, 45,533.93 and 20,999.39

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Solution

The fourth proportional to 30,402.12, 45,533.93 and 20,999.39 is: 31,451.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,402.12 : 45,533.93 = 20,999.39 : x
  2. Step 2: Convert to fraction form
    30,402.12/45,533.93 = 20,999.39/x
  3. Step 3: Cross multiply
    30,402.12x = 45,533.93 × 20,999.39
  4. Step 4: Simplify right side
    30,402.12x = 956,184,754.30
  5. Step 5: Solve for x
    x = 956,184,754.30/30,402.12
  6. Step 6: Final answer
    x = 31,451.25

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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.