Home / 28,509.76-39,343.52-15,935.04

Finding the Fourth Proportional to 28,509.76, 39,343.52 and 15,935.04

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Solution

The fourth proportional to 28,509.76, 39,343.52 and 15,935.04 is: 21,990.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,509.76 : 39,343.52 = 15,935.04 : x
  2. Step 2: Convert to fraction form
    28,509.76/39,343.52 = 15,935.04/x
  3. Step 3: Cross multiply
    28,509.76x = 39,343.52 × 15,935.04
  4. Step 4: Simplify right side
    28,509.76x = 626,940,564.94
  5. Step 5: Solve for x
    x = 626,940,564.94/28,509.76
  6. Step 6: Final answer
    x = 21,990.38

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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.