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Finding the Fourth Proportional to 19,855.79, 29,774.93 and 9,328.80

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Solution

The fourth proportional to 19,855.79, 29,774.93 and 9,328.80 is: 13,989.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,855.79 : 29,774.93 = 9,328.80 : x
  2. Step 2: Convert to fraction form
    19,855.79/29,774.93 = 9,328.80/x
  3. Step 3: Cross multiply
    19,855.79x = 29,774.93 × 9,328.80
  4. Step 4: Simplify right side
    19,855.79x = 277,764,218.11
  5. Step 5: Solve for x
    x = 277,764,218.11/19,855.79
  6. Step 6: Final answer
    x = 13,989.08

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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.