Home / 20,905.64-31,373.18-9,812.70

Finding the Fourth Proportional to 20,905.64, 31,373.18 and 9,812.70

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Solution

The fourth proportional to 20,905.64, 31,373.18 and 9,812.70 is: 14,725.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,905.64 : 31,373.18 = 9,812.70 : x
  2. Step 2: Convert to fraction form
    20,905.64/31,373.18 = 9,812.70/x
  3. Step 3: Cross multiply
    20,905.64x = 31,373.18 × 9,812.70
  4. Step 4: Simplify right side
    20,905.64x = 307,855,603.39
  5. Step 5: Solve for x
    x = 307,855,603.39/20,905.64
  6. Step 6: Final answer
    x = 14,725.96

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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.