Home / 20,909.98-28,850.67-11,835.55

Finding the Fourth Proportional to 20,909.98, 28,850.67 and 11,835.55

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Solution

The fourth proportional to 20,909.98, 28,850.67 and 11,835.55 is: 16,330.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.98 : 28,850.67 = 11,835.55 : x
  2. Step 2: Convert to fraction form
    20,909.98/28,850.67 = 11,835.55/x
  3. Step 3: Cross multiply
    20,909.98x = 28,850.67 × 11,835.55
  4. Step 4: Simplify right side
    20,909.98x = 341,463,547.32
  5. Step 5: Solve for x
    x = 341,463,547.32/20,909.98
  6. Step 6: Final answer
    x = 16,330.17

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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.