Home / 39,290.55-54,222.39-21,384.69

Finding the Fourth Proportional to 39,290.55, 54,222.39 and 21,384.69

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Solution

The fourth proportional to 39,290.55, 54,222.39 and 21,384.69 is: 29,511.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,290.55 : 54,222.39 = 21,384.69 : x
  2. Step 2: Convert to fraction form
    39,290.55/54,222.39 = 21,384.69/x
  3. Step 3: Cross multiply
    39,290.55x = 54,222.39 × 21,384.69
  4. Step 4: Simplify right side
    39,290.55x = 1,159,529,001.21
  5. Step 5: Solve for x
    x = 1,159,529,001.21/39,290.55
  6. Step 6: Final answer
    x = 29,511.65

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Double scale
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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.