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Finding the Fourth Proportional to 39,061.67, 53,905.08 and 21,156.67

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Solution

The fourth proportional to 39,061.67, 53,905.08 and 21,156.67 is: 29,196.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,061.67 : 53,905.08 = 21,156.67 : x
  2. Step 2: Convert to fraction form
    39,061.67/53,905.08 = 21,156.67/x
  3. Step 3: Cross multiply
    39,061.67x = 53,905.08 × 21,156.67
  4. Step 4: Simplify right side
    39,061.67x = 1,140,451,613.57
  5. Step 5: Solve for x
    x = 1,140,451,613.57/39,061.67
  6. Step 6: Final answer
    x = 29,196.19

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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.