Home / 9,880.90-13,635.13-5,403.78

Finding the Fourth Proportional to 9,880.90, 13,635.13 and 5,403.78

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Solution

The fourth proportional to 9,880.90, 13,635.13 and 5,403.78 is: 7,456.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,880.90 : 13,635.13 = 5,403.78 : x
  2. Step 2: Convert to fraction form
    9,880.90/13,635.13 = 5,403.78/x
  3. Step 3: Cross multiply
    9,880.90x = 13,635.13 × 5,403.78
  4. Step 4: Simplify right side
    9,880.90x = 73,681,242.79
  5. Step 5: Solve for x
    x = 73,681,242.79/9,880.90
  6. Step 6: Final answer
    x = 7,456.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.