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Finding the Fourth Proportional to 39,061.66, 53,905.07 and 21,156.66

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Solution

The fourth proportional to 39,061.66, 53,905.07 and 21,156.66 is: 29,196.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,061.66 : 53,905.07 = 21,156.66 : x
  2. Step 2: Convert to fraction form
    39,061.66/53,905.07 = 21,156.66/x
  3. Step 3: Cross multiply
    39,061.66x = 53,905.07 × 21,156.66
  4. Step 4: Simplify right side
    39,061.66x = 1,140,451,238.27
  5. Step 5: Solve for x
    x = 1,140,451,238.27/39,061.66
  6. Step 6: Final answer
    x = 29,196.18

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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.