Home / 28,556.20-39,406.71-15,809.95

Finding the Fourth Proportional to 28,556.20, 39,406.71 and 15,809.95

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Solution

The fourth proportional to 28,556.20, 39,406.71 and 15,809.95 is: 21,817.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,556.20 : 39,406.71 = 15,809.95 : x
  2. Step 2: Convert to fraction form
    28,556.20/39,406.71 = 15,809.95/x
  3. Step 3: Cross multiply
    28,556.20x = 39,406.71 × 15,809.95
  4. Step 4: Simplify right side
    28,556.20x = 623,018,114.76
  5. Step 5: Solve for x
    x = 623,018,114.76/28,556.20
  6. Step 6: Final answer
    x = 21,817.26

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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.