Home / 11,589.02-15,981.90-7,812.80

Finding the Fourth Proportional to 11,589.02, 15,981.90 and 7,812.80

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Solution

The fourth proportional to 11,589.02, 15,981.90 and 7,812.80 is: 10,774.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,589.02 : 15,981.90 = 7,812.80 : x
  2. Step 2: Convert to fraction form
    11,589.02/15,981.90 = 7,812.80/x
  3. Step 3: Cross multiply
    11,589.02x = 15,981.90 × 7,812.80
  4. Step 4: Simplify right side
    11,589.02x = 124,863,388.32
  5. Step 5: Solve for x
    x = 124,863,388.32/11,589.02
  6. Step 6: Final answer
    x = 10,774.28

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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.