Home / 20,341.82-28,068.48-11,389.70

Finding the Fourth Proportional to 20,341.82, 28,068.48 and 11,389.70

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Solution

The fourth proportional to 20,341.82, 28,068.48 and 11,389.70 is: 15,715.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,341.82 : 28,068.48 = 11,389.70 : x
  2. Step 2: Convert to fraction form
    20,341.82/28,068.48 = 11,389.70/x
  3. Step 3: Cross multiply
    20,341.82x = 28,068.48 × 11,389.70
  4. Step 4: Simplify right side
    20,341.82x = 319,691,566.66
  5. Step 5: Solve for x
    x = 319,691,566.66/20,341.82
  6. Step 6: Final answer
    x = 15,715.98

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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.