Home / 28,509.78-39,339.09-15,932.10

Finding the Fourth Proportional to 28,509.78, 39,339.09 and 15,932.10

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Solution

The fourth proportional to 28,509.78, 39,339.09 and 15,932.10 is: 21,983.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,509.78 : 39,339.09 = 15,932.10 : x
  2. Step 2: Convert to fraction form
    28,509.78/39,339.09 = 15,932.10/x
  3. Step 3: Cross multiply
    28,509.78x = 39,339.09 × 15,932.10
  4. Step 4: Simplify right side
    28,509.78x = 626,754,315.79
  5. Step 5: Solve for x
    x = 626,754,315.79/28,509.78
  6. Step 6: Final answer
    x = 21,983.84

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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.