Home / 42,621.12-63,931.20-19,241.28

Finding the Fourth Proportional to 42,621.12, 63,931.20 and 19,241.28

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Solution

The fourth proportional to 42,621.12, 63,931.20 and 19,241.28 is: 28,861.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,621.12 : 63,931.20 = 19,241.28 : x
  2. Step 2: Convert to fraction form
    42,621.12/63,931.20 = 19,241.28/x
  3. Step 3: Cross multiply
    42,621.12x = 63,931.20 × 19,241.28
  4. Step 4: Simplify right side
    42,621.12x = 1,230,118,119.94
  5. Step 5: Solve for x
    x = 1,230,118,119.94/42,621.12
  6. Step 6: Final answer
    x = 28,861.70

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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.