Home / 21,239.34-31,831.76-8,768.12

Finding the Fourth Proportional to 21,239.34, 31,831.76 and 8,768.12

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Solution

The fourth proportional to 21,239.34, 31,831.76 and 8,768.12 is: 13,140.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,239.34 : 31,831.76 = 8,768.12 : x
  2. Step 2: Convert to fraction form
    21,239.34/31,831.76 = 8,768.12/x
  3. Step 3: Cross multiply
    21,239.34x = 31,831.76 × 8,768.12
  4. Step 4: Simplify right side
    21,239.34x = 279,104,798.17
  5. Step 5: Solve for x
    x = 279,104,798.17/21,239.34
  6. Step 6: Final answer
    x = 13,140.94

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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.