Home / 19,878.86-27,434.71-11,381.65

Finding the Fourth Proportional to 19,878.86, 27,434.71 and 11,381.65

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Solution

The fourth proportional to 19,878.86, 27,434.71 and 11,381.65 is: 15,707.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,878.86 : 27,434.71 = 11,381.65 : x
  2. Step 2: Convert to fraction form
    19,878.86/27,434.71 = 11,381.65/x
  3. Step 3: Cross multiply
    19,878.86x = 27,434.71 × 11,381.65
  4. Step 4: Simplify right side
    19,878.86x = 312,252,267.07
  5. Step 5: Solve for x
    x = 312,252,267.07/19,878.86
  6. Step 6: Final answer
    x = 15,707.76

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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.