Home / 13,261.79-19,880.38-4,490.57

Finding the Fourth Proportional to 13,261.79, 19,880.38 and 4,490.57

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Solution

The fourth proportional to 13,261.79, 19,880.38 and 4,490.57 is: 6,731.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,261.79 : 19,880.38 = 4,490.57 : x
  2. Step 2: Convert to fraction form
    13,261.79/19,880.38 = 4,490.57/x
  3. Step 3: Cross multiply
    13,261.79x = 19,880.38 × 4,490.57
  4. Step 4: Simplify right side
    13,261.79x = 89,274,238.02
  5. Step 5: Solve for x
    x = 89,274,238.02/13,261.79
  6. Step 6: Final answer
    x = 6,731.69

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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.