Home / 10,972.20-15,136.80-6,992.40

Finding the Fourth Proportional to 10,972.20, 15,136.80 and 6,992.40

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Solution

The fourth proportional to 10,972.20, 15,136.80 and 6,992.40 is: 9,646.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,972.20 : 15,136.80 = 6,992.40 : x
  2. Step 2: Convert to fraction form
    10,972.20/15,136.80 = 6,992.40/x
  3. Step 3: Cross multiply
    10,972.20x = 15,136.80 × 6,992.40
  4. Step 4: Simplify right side
    10,972.20x = 105,842,560.32
  5. Step 5: Solve for x
    x = 105,842,560.32/10,972.20
  6. Step 6: Final answer
    x = 9,646.43

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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.