Home / 28,121.64-38,810.18-15,548.84

Finding the Fourth Proportional to 28,121.64, 38,810.18 and 15,548.84

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Solution

The fourth proportional to 28,121.64, 38,810.18 and 15,548.84 is: 21,458.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,121.64 : 38,810.18 = 15,548.84 : x
  2. Step 2: Convert to fraction form
    28,121.64/38,810.18 = 15,548.84/x
  3. Step 3: Cross multiply
    28,121.64x = 38,810.18 × 15,548.84
  4. Step 4: Simplify right side
    28,121.64x = 603,453,279.19
  5. Step 5: Solve for x
    x = 603,453,279.19/28,121.64
  6. Step 6: Final answer
    x = 21,458.68

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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.