Home / 28,359.84-39,071.06-20,388.28

Finding the Fourth Proportional to 28,359.84, 39,071.06 and 20,388.28

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Solution

The fourth proportional to 28,359.84, 39,071.06 and 20,388.28 is: 28,088.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,359.84 : 39,071.06 = 20,388.28 : x
  2. Step 2: Convert to fraction form
    28,359.84/39,071.06 = 20,388.28/x
  3. Step 3: Cross multiply
    28,359.84x = 39,071.06 × 20,388.28
  4. Step 4: Simplify right side
    28,359.84x = 796,591,711.18
  5. Step 5: Solve for x
    x = 796,591,711.18/28,359.84
  6. Step 6: Final answer
    x = 28,088.72

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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.