Home / 28,384.32-39,171.57-15,809.07

Finding the Fourth Proportional to 28,384.32, 39,171.57 and 15,809.07

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Solution

The fourth proportional to 28,384.32, 39,171.57 and 15,809.07 is: 21,817.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,384.32 : 39,171.57 = 15,809.07 : x
  2. Step 2: Convert to fraction form
    28,384.32/39,171.57 = 15,809.07/x
  3. Step 3: Cross multiply
    28,384.32x = 39,171.57 × 15,809.07
  4. Step 4: Simplify right side
    28,384.32x = 619,266,092.14
  5. Step 5: Solve for x
    x = 619,266,092.14/28,384.32
  6. Step 6: Final answer
    x = 21,817.19

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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.