Home / 20,953.87-31,420.93-7,617.48

Finding the Fourth Proportional to 20,953.87, 31,420.93 and 7,617.48

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Solution

The fourth proportional to 20,953.87, 31,420.93 and 7,617.48 is: 11,422.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,953.87 : 31,420.93 = 7,617.48 : x
  2. Step 2: Convert to fraction form
    20,953.87/31,420.93 = 7,617.48/x
  3. Step 3: Cross multiply
    20,953.87x = 31,420.93 × 7,617.48
  4. Step 4: Simplify right side
    20,953.87x = 239,348,305.86
  5. Step 5: Solve for x
    x = 239,348,305.86/20,953.87
  6. Step 6: Final answer
    x = 11,422.63

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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.