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Finding the Fourth Proportional to 19,782.48, 29,640.76 and 13,926.76

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Solution

The fourth proportional to 19,782.48, 29,640.76 and 13,926.76 is: 20,866.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,782.48 : 29,640.76 = 13,926.76 : x
  2. Step 2: Convert to fraction form
    19,782.48/29,640.76 = 13,926.76/x
  3. Step 3: Cross multiply
    19,782.48x = 29,640.76 × 13,926.76
  4. Step 4: Simplify right side
    19,782.48x = 412,799,750.74
  5. Step 5: Solve for x
    x = 412,799,750.74/19,782.48
  6. Step 6: Final answer
    x = 20,866.94

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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.