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Finding the Fourth Proportional to 9,887.88, 13,650.21 and 5,695.32

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Solution

The fourth proportional to 9,887.88, 13,650.21 and 5,695.32 is: 7,862.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,887.88 : 13,650.21 = 5,695.32 : x
  2. Step 2: Convert to fraction form
    9,887.88/13,650.21 = 5,695.32/x
  3. Step 3: Cross multiply
    9,887.88x = 13,650.21 × 5,695.32
  4. Step 4: Simplify right side
    9,887.88x = 77,742,314.02
  5. Step 5: Solve for x
    x = 77,742,314.02/9,887.88
  6. Step 6: Final answer
    x = 7,862.38

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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.