Home / 28,359-39,135.42-15,786.18

Finding the Fourth Proportional to 28,359, 39,135.42 and 15,786.18

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Solution

The fourth proportional to 28,359, 39,135.42 and 15,786.18 is: 21,784.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,359 : 39,135.42 = 15,786.18 : x
  2. Step 2: Convert to fraction form
    28,359/39,135.42 = 15,786.18/x
  3. Step 3: Cross multiply
    28,359x = 39,135.42 × 15,786.18
  4. Step 4: Simplify right side
    28,359x = 617,798,784.50
  5. Step 5: Solve for x
    x = 617,798,784.50/28,359
  6. Step 6: Final answer
    x = 21,784.93

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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.