Home / 9,403.20-12,988.80-7,839.36

Finding the Fourth Proportional to 9,403.20, 12,988.80 and 7,839.36

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Solution

The fourth proportional to 9,403.20, 12,988.80 and 7,839.36 is: 10,828.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,403.20 : 12,988.80 = 7,839.36 : x
  2. Step 2: Convert to fraction form
    9,403.20/12,988.80 = 7,839.36/x
  3. Step 3: Cross multiply
    9,403.20x = 12,988.80 × 7,839.36
  4. Step 4: Simplify right side
    9,403.20x = 101,823,879.17
  5. Step 5: Solve for x
    x = 101,823,879.17/9,403.20
  6. Step 6: Final answer
    x = 10,828.64

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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.