Home / 27,890.76-38,489.38-15,315.50

Finding the Fourth Proportional to 27,890.76, 38,489.38 and 15,315.50

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Solution

The fourth proportional to 27,890.76, 38,489.38 and 15,315.50 is: 21,135.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,890.76 : 38,489.38 = 15,315.50 : x
  2. Step 2: Convert to fraction form
    27,890.76/38,489.38 = 15,315.50/x
  3. Step 3: Cross multiply
    27,890.76x = 38,489.38 × 15,315.50
  4. Step 4: Simplify right side
    27,890.76x = 589,484,099.39
  5. Step 5: Solve for x
    x = 589,484,099.39/27,890.76
  6. Step 6: Final answer
    x = 21,135.46

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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.