Home / 20,828.63-28,756.67-12,875.37

Finding the Fourth Proportional to 20,828.63, 28,756.67 and 12,875.37

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Solution

The fourth proportional to 20,828.63, 28,756.67 and 12,875.37 is: 17,776.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.63 : 28,756.67 = 12,875.37 : x
  2. Step 2: Convert to fraction form
    20,828.63/28,756.67 = 12,875.37/x
  3. Step 3: Cross multiply
    20,828.63x = 28,756.67 × 12,875.37
  4. Step 4: Simplify right side
    20,828.63x = 370,252,701.84
  5. Step 5: Solve for x
    x = 370,252,701.84/20,828.63
  6. Step 6: Final answer
    x = 17,776.15

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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.