Home / 28,120.25-38,807.77-15,545

Finding the Fourth Proportional to 28,120.25, 38,807.77 and 15,545

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Solution

The fourth proportional to 28,120.25, 38,807.77 and 15,545 is: 21,453.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,120.25 : 38,807.77 = 15,545 : x
  2. Step 2: Convert to fraction form
    28,120.25/38,807.77 = 15,545/x
  3. Step 3: Cross multiply
    28,120.25x = 38,807.77 × 15,545
  4. Step 4: Simplify right side
    28,120.25x = 603,266,784.65
  5. Step 5: Solve for x
    x = 603,266,784.65/28,120.25
  6. Step 6: Final answer
    x = 21,453.11

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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.