Home / 9,887.36-13,644.74-5,638.91

Finding the Fourth Proportional to 9,887.36, 13,644.74 and 5,638.91

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Solution

The fourth proportional to 9,887.36, 13,644.74 and 5,638.91 is: 7,781.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,887.36 : 13,644.74 = 5,638.91 : x
  2. Step 2: Convert to fraction form
    9,887.36/13,644.74 = 5,638.91/x
  3. Step 3: Cross multiply
    9,887.36x = 13,644.74 × 5,638.91
  4. Step 4: Simplify right side
    9,887.36x = 76,941,432.64
  5. Step 5: Solve for x
    x = 76,941,432.64/9,887.36
  6. Step 6: Final answer
    x = 7,781.80

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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.