Home / 20,547.72-30,821.58-13,155.66

Finding the Fourth Proportional to 20,547.72, 30,821.58 and 13,155.66

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Solution

The fourth proportional to 20,547.72, 30,821.58 and 13,155.66 is: 19,733.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,547.72 : 30,821.58 = 13,155.66 : x
  2. Step 2: Convert to fraction form
    20,547.72/30,821.58 = 13,155.66/x
  3. Step 3: Cross multiply
    20,547.72x = 30,821.58 × 13,155.66
  4. Step 4: Simplify right side
    20,547.72x = 405,478,227.14
  5. Step 5: Solve for x
    x = 405,478,227.14/20,547.72
  6. Step 6: Final answer
    x = 19,733.49

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Similar ratio
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1.5x scale

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.