Home / 28,359.28-39,137.34-15,784.30

Finding the Fourth Proportional to 28,359.28, 39,137.34 and 15,784.30

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Solution

The fourth proportional to 28,359.28, 39,137.34 and 15,784.30 is: 21,783.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,359.28 : 39,137.34 = 15,784.30 : x
  2. Step 2: Convert to fraction form
    28,359.28/39,137.34 = 15,784.30/x
  3. Step 3: Cross multiply
    28,359.28x = 39,137.34 × 15,784.30
  4. Step 4: Simplify right side
    28,359.28x = 617,755,515.76
  5. Step 5: Solve for x
    x = 617,755,515.76/28,359.28
  6. Step 6: Final answer
    x = 21,783.19

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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.