Home / 30,168.30-45,178.56-21,261.72

Finding the Fourth Proportional to 30,168.30, 45,178.56 and 21,261.72

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Solution

The fourth proportional to 30,168.30, 45,178.56 and 21,261.72 is: 31,840.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,168.30 : 45,178.56 = 21,261.72 : x
  2. Step 2: Convert to fraction form
    30,168.30/45,178.56 = 21,261.72/x
  3. Step 3: Cross multiply
    30,168.30x = 45,178.56 × 21,261.72
  4. Step 4: Simplify right side
    30,168.30x = 960,573,892.72
  5. Step 5: Solve for x
    x = 960,573,892.72/30,168.30
  6. Step 6: Final answer
    x = 31,840.50

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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.