Home / 9,661.20-13,315.50-7,972.62

Finding the Fourth Proportional to 9,661.20, 13,315.50 and 7,972.62

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Solution

The fourth proportional to 9,661.20, 13,315.50 and 7,972.62 is: 10,988.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,661.20 : 13,315.50 = 7,972.62 : x
  2. Step 2: Convert to fraction form
    9,661.20/13,315.50 = 7,972.62/x
  3. Step 3: Cross multiply
    9,661.20x = 13,315.50 × 7,972.62
  4. Step 4: Simplify right side
    9,661.20x = 106,159,421.61
  5. Step 5: Solve for x
    x = 106,159,421.61/9,661.20
  6. Step 6: Final answer
    x = 10,988.22

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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.