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Finding the Fourth Proportional to 19,666.80, 29,482.92 and 9,291.12

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Solution

The fourth proportional to 19,666.80, 29,482.92 and 9,291.12 is: 13,928.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,666.80 : 29,482.92 = 9,291.12 : x
  2. Step 2: Convert to fraction form
    19,666.80/29,482.92 = 9,291.12/x
  3. Step 3: Cross multiply
    19,666.80x = 29,482.92 × 9,291.12
  4. Step 4: Simplify right side
    19,666.80x = 273,929,347.67
  5. Step 5: Solve for x
    x = 273,929,347.67/19,666.80
  6. Step 6: Final answer
    x = 13,928.52

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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.