Home / 20,656.40-28,501.13-11,701.85

Finding the Fourth Proportional to 20,656.40, 28,501.13 and 11,701.85

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Solution

The fourth proportional to 20,656.40, 28,501.13 and 11,701.85 is: 16,145.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,656.40 : 28,501.13 = 11,701.85 : x
  2. Step 2: Convert to fraction form
    20,656.40/28,501.13 = 11,701.85/x
  3. Step 3: Cross multiply
    20,656.40x = 28,501.13 × 11,701.85
  4. Step 4: Simplify right side
    20,656.40x = 333,515,834.84
  5. Step 5: Solve for x
    x = 333,515,834.84/20,656.40
  6. Step 6: Final answer
    x = 16,145.89

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1.5x scale

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.