Home / 20,666.13-30,931.35-14,650.66

Finding the Fourth Proportional to 20,666.13, 30,931.35 and 14,650.66

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Solution

The fourth proportional to 20,666.13, 30,931.35 and 14,650.66 is: 21,927.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.13 : 30,931.35 = 14,650.66 : x
  2. Step 2: Convert to fraction form
    20,666.13/30,931.35 = 14,650.66/x
  3. Step 3: Cross multiply
    20,666.13x = 30,931.35 × 14,650.66
  4. Step 4: Simplify right side
    20,666.13x = 453,164,692.19
  5. Step 5: Solve for x
    x = 453,164,692.19/20,666.13
  6. Step 6: Final answer
    x = 21,927.89

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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.