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Finding the Fourth Proportional to 19,866.63, 29,799.95 and 7,389.79

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Solution

The fourth proportional to 19,866.63, 29,799.95 and 7,389.79 is: 11,084.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,866.63 : 29,799.95 = 7,389.79 : x
  2. Step 2: Convert to fraction form
    19,866.63/29,799.95 = 7,389.79/x
  3. Step 3: Cross multiply
    19,866.63x = 29,799.95 × 7,389.79
  4. Step 4: Simplify right side
    19,866.63x = 220,215,372.51
  5. Step 5: Solve for x
    x = 220,215,372.51/19,866.63
  6. Step 6: Final answer
    x = 11,084.69

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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.