Home / 18,711.74-25,813.40-11,153.76

Finding the Fourth Proportional to 18,711.74, 25,813.40 and 11,153.76

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Solution

The fourth proportional to 18,711.74, 25,813.40 and 11,153.76 is: 15,386.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,711.74 : 25,813.40 = 11,153.76 : x
  2. Step 2: Convert to fraction form
    18,711.74/25,813.40 = 11,153.76/x
  3. Step 3: Cross multiply
    18,711.74x = 25,813.40 × 11,153.76
  4. Step 4: Simplify right side
    18,711.74x = 287,916,412.62
  5. Step 5: Solve for x
    x = 287,916,412.62/18,711.74
  6. Step 6: Final answer
    x = 15,386.94

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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.