Home / 21,141.20-31,688.91-13,750.94

Finding the Fourth Proportional to 21,141.20, 31,688.91 and 13,750.94

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Solution

The fourth proportional to 21,141.20, 31,688.91 and 13,750.94 is: 20,611.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,141.20 : 31,688.91 = 13,750.94 : x
  2. Step 2: Convert to fraction form
    21,141.20/31,688.91 = 13,750.94/x
  3. Step 3: Cross multiply
    21,141.20x = 31,688.91 × 13,750.94
  4. Step 4: Simplify right side
    21,141.20x = 435,752,300.08
  5. Step 5: Solve for x
    x = 435,752,300.08/21,141.20
  6. Step 6: Final answer
    x = 20,611.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.