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Finding the Fourth Proportional to 19,920.61, 29,880.90 and 11,041.39

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Solution

The fourth proportional to 19,920.61, 29,880.90 and 11,041.39 is: 16,562.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,920.61 : 29,880.90 = 11,041.39 : x
  2. Step 2: Convert to fraction form
    19,920.61/29,880.90 = 11,041.39/x
  3. Step 3: Cross multiply
    19,920.61x = 29,880.90 × 11,041.39
  4. Step 4: Simplify right side
    19,920.61x = 329,926,670.45
  5. Step 5: Solve for x
    x = 329,926,670.45/19,920.61
  6. Step 6: Final answer
    x = 16,562.08

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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.