Home / 28,239.70-38,969.08-15,664.45

Finding the Fourth Proportional to 28,239.70, 38,969.08 and 15,664.45

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Solution

The fourth proportional to 28,239.70, 38,969.08 and 15,664.45 is: 21,615.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,239.70 : 38,969.08 = 15,664.45 : x
  2. Step 2: Convert to fraction form
    28,239.70/38,969.08 = 15,664.45/x
  3. Step 3: Cross multiply
    28,239.70x = 38,969.08 × 15,664.45
  4. Step 4: Simplify right side
    28,239.70x = 610,429,205.21
  5. Step 5: Solve for x
    x = 610,429,205.21/28,239.70
  6. Step 6: Final answer
    x = 21,615.99

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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.