Home / 45,142.56-67,718.64-13,980.24

Finding the Fourth Proportional to 45,142.56, 67,718.64 and 13,980.24

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Solution

The fourth proportional to 45,142.56, 67,718.64 and 13,980.24 is: 20,971.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,142.56 : 67,718.64 = 13,980.24 : x
  2. Step 2: Convert to fraction form
    45,142.56/67,718.64 = 13,980.24/x
  3. Step 3: Cross multiply
    45,142.56x = 67,718.64 × 13,980.24
  4. Step 4: Simplify right side
    45,142.56x = 946,722,839.67
  5. Step 5: Solve for x
    x = 946,722,839.67/45,142.56
  6. Step 6: Final answer
    x = 20,971.85

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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.