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Finding the Fourth Proportional to 40,652.55, 60,989.72 and 20,920.32

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Solution

The fourth proportional to 40,652.55, 60,989.72 and 20,920.32 is: 31,386.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,652.55 : 60,989.72 = 20,920.32 : x
  2. Step 2: Convert to fraction form
    40,652.55/60,989.72 = 20,920.32/x
  3. Step 3: Cross multiply
    40,652.55x = 60,989.72 × 20,920.32
  4. Step 4: Simplify right side
    40,652.55x = 1,275,924,354.51
  5. Step 5: Solve for x
    x = 1,275,924,354.51/40,652.55
  6. Step 6: Final answer
    x = 31,386.08

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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.