Home / 28,781.65-39,711.76-16,206.40

Finding the Fourth Proportional to 28,781.65, 39,711.76 and 16,206.40

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Solution

The fourth proportional to 28,781.65, 39,711.76 and 16,206.40 is: 22,360.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,781.65 : 39,711.76 = 16,206.40 : x
  2. Step 2: Convert to fraction form
    28,781.65/39,711.76 = 16,206.40/x
  3. Step 3: Cross multiply
    28,781.65x = 39,711.76 × 16,206.40
  4. Step 4: Simplify right side
    28,781.65x = 643,584,667.26
  5. Step 5: Solve for x
    x = 643,584,667.26/28,781.65
  6. Step 6: Final answer
    x = 22,360.94

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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.