Home / 28,515.34-39,347.73-15,766.78

Finding the Fourth Proportional to 28,515.34, 39,347.73 and 15,766.78

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Solution

The fourth proportional to 28,515.34, 39,347.73 and 15,766.78 is: 21,756.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,515.34 : 39,347.73 = 15,766.78 : x
  2. Step 2: Convert to fraction form
    28,515.34/39,347.73 = 15,766.78/x
  3. Step 3: Cross multiply
    28,515.34x = 39,347.73 × 15,766.78
  4. Step 4: Simplify right side
    28,515.34x = 620,387,002.41
  5. Step 5: Solve for x
    x = 620,387,002.41/28,515.34
  6. Step 6: Final answer
    x = 21,756.25

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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.