Home / 28,012.08-38,658.48-15,436.80

Finding the Fourth Proportional to 28,012.08, 38,658.48 and 15,436.80

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Solution

The fourth proportional to 28,012.08, 38,658.48 and 15,436.80 is: 21,303.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,012.08 : 38,658.48 = 15,436.80 : x
  2. Step 2: Convert to fraction form
    28,012.08/38,658.48 = 15,436.80/x
  3. Step 3: Cross multiply
    28,012.08x = 38,658.48 × 15,436.80
  4. Step 4: Simplify right side
    28,012.08x = 596,763,224.06
  5. Step 5: Solve for x
    x = 596,763,224.06/28,012.08
  6. Step 6: Final answer
    x = 21,303.78

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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.