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Finding the Fourth Proportional to 9,675.20, 13,354.80 and 5,643.20

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Solution

The fourth proportional to 9,675.20, 13,354.80 and 5,643.20 is: 7,789.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,675.20 : 13,354.80 = 5,643.20 : x
  2. Step 2: Convert to fraction form
    9,675.20/13,354.80 = 5,643.20/x
  3. Step 3: Cross multiply
    9,675.20x = 13,354.80 × 5,643.20
  4. Step 4: Simplify right side
    9,675.20x = 75,363,807.36
  5. Step 5: Solve for x
    x = 75,363,807.36/9,675.20
  6. Step 6: Final answer
    x = 7,789.38

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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.