Home / 28,359.87-39,135.95-15,784.35

Finding the Fourth Proportional to 28,359.87, 39,135.95 and 15,784.35

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Solution

The fourth proportional to 28,359.87, 39,135.95 and 15,784.35 is: 21,782.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,359.87 : 39,135.95 = 15,784.35 : x
  2. Step 2: Convert to fraction form
    28,359.87/39,135.95 = 15,784.35/x
  3. Step 3: Cross multiply
    28,359.87x = 39,135.95 × 15,784.35
  4. Step 4: Simplify right side
    28,359.87x = 617,735,532.38
  5. Step 5: Solve for x
    x = 617,735,532.38/28,359.87
  6. Step 6: Final answer
    x = 21,782.03

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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.