Home / 20,931.34-28,898.76-12,982

Finding the Fourth Proportional to 20,931.34, 28,898.76 and 12,982

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Solution

The fourth proportional to 20,931.34, 28,898.76 and 12,982 is: 17,923.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,931.34 : 28,898.76 = 12,982 : x
  2. Step 2: Convert to fraction form
    20,931.34/28,898.76 = 12,982/x
  3. Step 3: Cross multiply
    20,931.34x = 28,898.76 × 12,982
  4. Step 4: Simplify right side
    20,931.34x = 375,163,702.32
  5. Step 5: Solve for x
    x = 375,163,702.32/20,931.34
  6. Step 6: Final answer
    x = 17,923.54

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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.