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Finding the Fourth Proportional to 19,135.89, 28,716.89 and 6,655.79

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Solution

The fourth proportional to 19,135.89, 28,716.89 and 6,655.79 is: 9,988.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,135.89 : 28,716.89 = 6,655.79 : x
  2. Step 2: Convert to fraction form
    19,135.89/28,716.89 = 6,655.79/x
  3. Step 3: Cross multiply
    19,135.89x = 28,716.89 × 6,655.79
  4. Step 4: Simplify right side
    19,135.89x = 191,133,503.71
  5. Step 5: Solve for x
    x = 191,133,503.71/19,135.89
  6. Step 6: Final answer
    x = 9,988.22

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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.