Home / 28,746-39,679.20-20,386.80

Finding the Fourth Proportional to 28,746, 39,679.20 and 20,386.80

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Solution

The fourth proportional to 28,746, 39,679.20 and 20,386.80 is: 28,140.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,746 : 39,679.20 = 20,386.80 : x
  2. Step 2: Convert to fraction form
    28,746/39,679.20 = 20,386.80/x
  3. Step 3: Cross multiply
    28,746x = 39,679.20 × 20,386.80
  4. Step 4: Simplify right side
    28,746x = 808,931,914.56
  5. Step 5: Solve for x
    x = 808,931,914.56/28,746
  6. Step 6: Final answer
    x = 28,140.68

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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.