Home / 20,889.49-28,831.18-12,396.30

Finding the Fourth Proportional to 20,889.49, 28,831.18 and 12,396.30

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Solution

The fourth proportional to 20,889.49, 28,831.18 and 12,396.30 is: 17,109.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.49 : 28,831.18 = 12,396.30 : x
  2. Step 2: Convert to fraction form
    20,889.49/28,831.18 = 12,396.30/x
  3. Step 3: Cross multiply
    20,889.49x = 28,831.18 × 12,396.30
  4. Step 4: Simplify right side
    20,889.49x = 357,399,895.91
  5. Step 5: Solve for x
    x = 357,399,895.91/20,889.49
  6. Step 6: Final answer
    x = 17,109.08

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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.