Home / 28,359.36-39,138.24-15,788.16

Finding the Fourth Proportional to 28,359.36, 39,138.24 and 15,788.16

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Solution

The fourth proportional to 28,359.36, 39,138.24 and 15,788.16 is: 21,788.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,359.36 : 39,138.24 = 15,788.16 : x
  2. Step 2: Convert to fraction form
    28,359.36/39,138.24 = 15,788.16/x
  3. Step 3: Cross multiply
    28,359.36x = 39,138.24 × 15,788.16
  4. Step 4: Simplify right side
    28,359.36x = 617,920,795.24
  5. Step 5: Solve for x
    x = 617,920,795.24/28,359.36
  6. Step 6: Final answer
    x = 21,788.95

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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.