Home / 28,385.24-39,172.01-15,809.99

Finding the Fourth Proportional to 28,385.24, 39,172.01 and 15,809.99

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Solution

The fourth proportional to 28,385.24, 39,172.01 and 15,809.99 is: 21,817.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,385.24 : 39,172.01 = 15,809.99 : x
  2. Step 2: Convert to fraction form
    28,385.24/39,172.01 = 15,809.99/x
  3. Step 3: Cross multiply
    28,385.24x = 39,172.01 × 15,809.99
  4. Step 4: Simplify right side
    28,385.24x = 619,308,811.47
  5. Step 5: Solve for x
    x = 619,308,811.47/28,385.24
  6. Step 6: Final answer
    x = 21,817.99

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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.