Home / 20,860.98-28,780.81-14,485.87

Finding the Fourth Proportional to 20,860.98, 28,780.81 and 14,485.87

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Solution

The fourth proportional to 20,860.98, 28,780.81 and 14,485.87 is: 19,985.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.98 : 28,780.81 = 14,485.87 : x
  2. Step 2: Convert to fraction form
    20,860.98/28,780.81 = 14,485.87/x
  3. Step 3: Cross multiply
    20,860.98x = 28,780.81 × 14,485.87
  4. Step 4: Simplify right side
    20,860.98x = 416,915,072.15
  5. Step 5: Solve for x
    x = 416,915,072.15/20,860.98
  6. Step 6: Final answer
    x = 19,985.40

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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.