Home / 9,639.20-13,298.98-5,661.30

Finding the Fourth Proportional to 9,639.20, 13,298.98 and 5,661.30

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Solution

The fourth proportional to 9,639.20, 13,298.98 and 5,661.30 is: 7,810.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,639.20 : 13,298.98 = 5,661.30 : x
  2. Step 2: Convert to fraction form
    9,639.20/13,298.98 = 5,661.30/x
  3. Step 3: Cross multiply
    9,639.20x = 13,298.98 × 5,661.30
  4. Step 4: Simplify right side
    9,639.20x = 75,289,515.47
  5. Step 5: Solve for x
    x = 75,289,515.47/9,639.20
  6. Step 6: Final answer
    x = 7,810.76

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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.