Home / 11,387.20-16,980.32-10,981.12

Finding the Fourth Proportional to 11,387.20, 16,980.32 and 10,981.12

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Solution

The fourth proportional to 11,387.20, 16,980.32 and 10,981.12 is: 16,374.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,387.20 : 16,980.32 = 10,981.12 : x
  2. Step 2: Convert to fraction form
    11,387.20/16,980.32 = 10,981.12/x
  3. Step 3: Cross multiply
    11,387.20x = 16,980.32 × 10,981.12
  4. Step 4: Simplify right side
    11,387.20x = 186,462,931.56
  5. Step 5: Solve for x
    x = 186,462,931.56/11,387.20
  6. Step 6: Final answer
    x = 16,374.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.