Home / 20,931.16-31,408.98-7,792.84

Finding the Fourth Proportional to 20,931.16, 31,408.98 and 7,792.84

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Solution

The fourth proportional to 20,931.16, 31,408.98 and 7,792.84 is: 11,693.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,931.16 : 31,408.98 = 7,792.84 : x
  2. Step 2: Convert to fraction form
    20,931.16/31,408.98 = 7,792.84/x
  3. Step 3: Cross multiply
    20,931.16x = 31,408.98 × 7,792.84
  4. Step 4: Simplify right side
    20,931.16x = 244,765,155.70
  5. Step 5: Solve for x
    x = 244,765,155.70/20,931.16
  6. Step 6: Final answer
    x = 11,693.82

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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.